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  • How to delete rows based on comparison from Data Flow Task in an SSIS?

    - by vikasde
    I have a DataFlow task with two OLE DB Source objects. This is the SQL I want to achieve using SSIS: Insert into server2.db.dbo.[table2] (...) Select col1, col2, col3 ... from Server1.db.dbo.[table1] where [table1.col1] not in (Select col5 from server2.db.dbo.[table2] Where ...) I am pretty new to SSIS and not sure how to achieve this. I thought I could do this using the Data Flow task and populating the first source with the data from server1.db.dbo.table1 and the second source with server2.db.dbo.[table2] and then do the conditional check before inserting it into server2.db.dbo.[table2]. I am not sure how to do the conditional check though. Any help is appreciated.

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  • Python code to do csv file row entries comparison operations and count the number of times row value

    - by Venomancer
    have an excel based CSV file with two columns (or rows, Pythonically) that I am working on. What I need to do is to perform some operations so that I can compare the two data entries in each 'row'. To be more precise, one column has constant numbers all the way down, whereas the other column has varying values. So I need to count the number of times the varying column data entry values crosses the constant value on the other column. For example, fro the csv file i have two columns: Varying Column; Constant Column 24 25 26 25 crossed 27 25 26 25 25.5 25 23 25 crossed 26 25 crossed Thus, the varying column data entries have crossed 25 three times. I need to generate a code that can count the number of the crosses. Please do help out, Thanks.

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  • How do I check the Database type in a Rails Migration?

    - by Shaun F
    I have the following migration and I want to be able to check if the current database related to the environment is a mysql database. If it's mysql then I want to execute the SQL that is specific to the database. How do I go about this? class AddUsersFb < ActiveRecord::Migration def self.up add_column :users, :fb_user_id, :integer add_column :users, :email_hash, :string #if mysql #execute("alter table users modify fb_user_id bigint") end def self.down remove_column :users, :fb_user_id remove_column :users, :email_hash end end

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  • C++: How to make comparison function for char arrays?

    - by Newbie
    Is this possible? i get weird error message when i put char as the type: inline bool operator==(const char *str1, const char *str2){ // ... } Error message: error C2803: 'operator ==' must have at least one formal parameter of class type ... which i dont understand at all. I was thinking if i could directly compare stuff like: const char *str1 = "something"; const char *str2 = "something else"; const char str3[] = "lol"; // not sure if this is same as above and then compare: if(str1 == str2){ // ... } etc. But i also want it to work with: char *str = new char[100]; and: char *str = (char *)malloc(100); I am assuming every char array i use this way would end in NULL character, so the checking should be possible, but i understand it can be unsafe etc. I just want to know if this is possible to do, and how.

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  • Could this C cast to avoid a signed/unsigned comparison make any sense?

    - by sharptooth
    I'm reviewing a C++ project and see effectively the following: std::vector<SomeType> objects; //then later int size = (int)objects.size(); for( int i = 0; i < size; ++i ) { process( objects[i] ); } Here's what I see. std::vector::size() returns size_t that can be of some size not related to the size of int. Even if sizeof(int) == sizeof(size_t) int is signed and can't hold all possible values of size_t. So the code above could only process the lower part of a very long vector and contains a bug. That said I'm curious of why the author might have written this? My only guess is that first he omitted the (int) cast and the compiler emitted something like Visual C++ C4018 warning: warning C4018: '<' : signed/unsigned mismatch so the author though that the best way to avoid the compiler warning would be to simply cast the size_t to int thus making the compiler shut up. Is there any other possible sane reason for that C cast?

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  • Can a SQL Server 2008 database support both a REST and SOAP web services within two different endpoints?

    - by PaulDecember
    Say you have a SQL Server 2008 database. You build a SOAP web service. You then deploy or publish this using Visual Studio 2010 in one website. Now, using the same database, you build a REST web service, in a different solution. You deploy this on another website. Can you consume the endpoints and/or .svc file of both the SOAP and REST web services, though they reference the same SQL Server 2008 database? I don't see why not, but before I go down this path and spend days I'd like to make sure. Also if there's a performance hit to the database if it is running both SOAP and REST at the same time--again, I don't see why it would matter, but I must make sure. Thanks.

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  • What's the simplest way of defining lexicographic comparison for elements of a class?

    - by the_mandrill
    If I have a class that I want to be able to sort (ie support a less-than concept), and it has several data items such that I need to do lexicographic ordering then I need something like this: struct MyData { string surname; string forename; bool operator<(const MyData& other) const { return surname < other.surname || (surname==other.surname && forename < other.forename); } }; This becomes pretty unmanageable for anything with more than 2 data members. Are there any simpler ways of achieving it? The data members may be any Comparable class.

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  • Is it possible to set path of database for delayed job in rails?

    - by WitchOfCloud
    Now, I am developing with mailing system with delayed_jobs gem. When I ran on developing environment, it operated well. But, after deploying application on server, it is not acted. This is my database.yml development: adapter: sqlite3 database: db/development.sqlite3 pool: 5 timeout: 5000 test: adapter: sqlite3 database: db/test.sqlite3 pool: 5 timeout: 5000 production: adapter: sqlite3 database: /var/www/service/shared/db/production.sqlite3 pool: 5 timeout: 5000 I checked queue(in /var/www/...) and it act well. Also, I started delayed_jobs(rake jobs:work). So, I think that problem is delayed_job crawl db/development.sqlite3 How can solve this problem?

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  • How do I use a file grep comparison inside a bash if/else statement?

    - by openid_kenja
    When our server comes up we need to check a file to see how the server is configured. We want to search for the following string inside our /etc/aws/hosts.conf file: MYSQL_ROLE=master Then, we want to test whether that string exists and use an if/else statement to run one of two options depending on whether the string exists or not. What is the BASH syntax for the if statement? if [ ????? ]; then #do one thing else #do another thing fi

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  • Efficient method of finding database rows that have *one or more* qualities from a list of seven qualities

    - by hithere
    Hello! For this question, I'm looking to see if anyone has a better idea of how to implement what I'm currently planning on implementing (below): I'm keeping track of a set of images, using a database. Each image is represented by one row. I want to be able to search for images, using a number of different search parameters. One of these parameters involves a search-by-color option. (The rest of the search stuff is currently working fine.) Images in this database can contain up to seven colors: -Red -Orange -Yellow -Green -Blue -Indigo -Violet Here are some example user queries: "I want an image that contains red." "I want an image that contains red and blue." "I want an image that contains yellow and violet." "I want an image that contains red, orange, yellow, green, blue, indigo and violet." And so on. Users make this selection through the use of checkboxes in an html form. They can check zero checkboxes, all seven, and anything in between. I'm curious to hear what people think would be the most efficient way to perform this database search. I have two possible options right now, but I feel like there must be something better that I'm not thinking of. (Option 1) -For each row, simply have seven additional fields in the database, one for each color. Each field holds a 1 or 0 (true/false) value, and I SELECT based on whatever the user has checked off. (I didn't like this solution so much, because it seemed kind of wasteful to add seven additional fields...especially since most pictures in this table will only have 3-4 colors max, though some could have up to 7. So that means I'm storing a lot of zeros.) Also, if I added more searchable colors later on (which I don't think I will, but it's always possible), I'd have to add more fields. (Option 2) -For each image row, I could have a "colors" text field that stores space-separated color names (or numbers for the sake of compactness). Then I could do a fulltext match against search through the fields, selecting rows that contain "red yellow green" (or "1 3 4"). But I kind of didn't want to do fulltext searching because I already allow a keyword search, and I didn't really want to do two fulltext searches per image search. Plus, if the database gets big, fulltext stuff might slow down. Any better options that I didn't think of? Thanks! Side Note: I'm using PHP to work with a MySQL database.

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  • Know more about shared pool subpool

    - by Liu Maclean(???)
    ????T.askmaclean.com???Shared Pool?SubPool?????,????????_kghdsidx_count ? subpool ??subpool????( ???duration)???: SQL> select * from v$version; BANNER ---------------------------------------------------------------- Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bi PL/SQL Release 10.2.0.5.0 - Production CORE    10.2.0.5.0      Production TNS for Linux: Version 10.2.0.5.0 - Production NLSRTL Version 10.2.0.5.0 - Production SQL> set linesize 200 pagesize 1400 SQL> show parameter kgh NAME                                 TYPE                             VALUE ------------------------------------ -------------------------------- ------------------------------ _kghdsidx_count                      integer                          7 SQL> oradebug setmypid; Statement processed. SQL> oradebug dump heapdump 536870914; Statement processed. SQL> oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_11783.trc [oracle@vrh8 dbs]$ grep "sga heap"  /s01/admin/G10R25/udump/g10r25_ora_11783.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x60036110 FIVE LARGEST SUB HEAPS for heap name="sga heap(1,0)"   desc=0x60036110 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003f938 FIVE LARGEST SUB HEAPS for heap name="sga heap(2,0)"   desc=0x6003f938 HEAP DUMP heap name="sga heap(3,0)"  desc=0x60049160 FIVE LARGEST SUB HEAPS for heap name="sga heap(3,0)"   desc=0x60049160 HEAP DUMP heap name="sga heap(4,0)"  desc=0x60052988 FIVE LARGEST SUB HEAPS for heap name="sga heap(4,0)"   desc=0x60052988 HEAP DUMP heap name="sga heap(5,0)"  desc=0x6005c1b0 FIVE LARGEST SUB HEAPS for heap name="sga heap(5,0)"   desc=0x6005c1b0 HEAP DUMP heap name="sga heap(6,0)"  desc=0x600659d8 FIVE LARGEST SUB HEAPS for heap name="sga heap(6,0)"   desc=0x600659d8 HEAP DUMP heap name="sga heap(7,0)"  desc=0x6006f200 FIVE LARGEST SUB HEAPS for heap name="sga heap(7,0)"   desc=0x6006f200 SQL> alter system set "_kghdsidx_count"=6 scope=spfile; System altered. SQL> startup force; ORACLE instance started. Total System Global Area  859832320 bytes Fixed Size                  2100104 bytes Variable Size             746587256 bytes Database Buffers          104857600 bytes Redo Buffers                6287360 bytes Database mounted. Database opened. SQL> SQL> oradebug setmypid; Statement processed. SQL> oradebug dump heapdump 536870914; Statement processed. SQL> oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_11908.trc [oracle@vrh8 dbs]$ grep "sga heap"  /s01/admin/G10R25/udump/g10r25_ora_11908.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x600360f0 FIVE LARGEST SUB HEAPS for heap name="sga heap(1,0)"   desc=0x600360f0 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003f918 FIVE LARGEST SUB HEAPS for heap name="sga heap(2,0)"   desc=0x6003f918 HEAP DUMP heap name="sga heap(3,0)"  desc=0x60049140 FIVE LARGEST SUB HEAPS for heap name="sga heap(3,0)"   desc=0x60049140 HEAP DUMP heap name="sga heap(4,0)"  desc=0x60052968 FIVE LARGEST SUB HEAPS for heap name="sga heap(4,0)"   desc=0x60052968 HEAP DUMP heap name="sga heap(5,0)"  desc=0x6005c190 FIVE LARGEST SUB HEAPS for heap name="sga heap(5,0)"   desc=0x6005c190 HEAP DUMP heap name="sga heap(6,0)"  desc=0x600659b8 FIVE LARGEST SUB HEAPS for heap name="sga heap(6,0)"   desc=0x600659b8 SQL> SQL> alter system set "_kghdsidx_count"=2 scope=spfile; System altered. SQL> SQL> startup force; ORACLE instance started. Total System Global Area  851443712 bytes Fixed Size                  2100040 bytes Variable Size             738198712 bytes Database Buffers          104857600 bytes Redo Buffers                6287360 bytes Database mounted. Database opened. SQL> oradebug setmypid; Statement processed. SQL> oradebug dump heapdump 2; Statement processed. SQL> oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_12003.trc [oracle@vrh8 ~]$ grep "sga heap"  /s01/admin/G10R25/udump/g10r25_ora_12003.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x600360b0 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003f8d SQL> alter system set cpu_count=16 scope=spfile; System altered. SQL> startup force; ORACLE instance started. Total System Global Area  851443712 bytes Fixed Size                  2100040 bytes Variable Size             738198712 bytes Database Buffers          104857600 bytes Redo Buffers                6287360 bytes Database mounted. Database opened. SQL> oradebug setmypid; Statement processed. SQL>  oradebug dump heapdump 2; Statement processed. SQL> oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_12065.trc [oracle@vrh8 ~]$ grep "sga heap"  /s01/admin/G10R25/udump/g10r25_ora_12065.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x600360b0 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003f8d8 SQL> show parameter sga_target NAME                                 TYPE                             VALUE ------------------------------------ -------------------------------- ------------------------------ sga_target                           big integer                      0 SQL> alter system set sga_target=1000M scope=spfile; System altered. SQL> startup force; ORACLE instance started. Total System Global Area 1048576000 bytes Fixed Size                  2101544 bytes Variable Size             738201304 bytes Database Buffers          301989888 bytes Redo Buffers                6283264 bytes Database mounted. Database opened. SQL> alter system set sga_target=1000M scope=spfile; System altered. SQL> startup force; ORACLE instance started. Total System Global Area 1048576000 bytes Fixed Size                  2101544 bytes Variable Size             738201304 bytes Database Buffers          301989888 bytes Redo Buffers                6283264 bytes Database mounted. Database opened. SQL> SQL> SQL> oradebug setmypid; Statement processed. SQL> oradebug dump heapdump 2; Statement processed. SQL>  oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_12148.trc SQL> SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options [oracle@vrh8 dbs]$ grep "sga heap"  /s01/admin/G10R25/udump/g10r25_ora_12148.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x60036690 HEAP DUMP heap name="sga heap(1,1)"  desc=0x60037ee8 HEAP DUMP heap name="sga heap(1,2)"  desc=0x60039740 HEAP DUMP heap name="sga heap(1,3)"  desc=0x6003af98 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003feb8 HEAP DUMP heap name="sga heap(2,1)"  desc=0x60041710 HEAP DUMP heap name="sga heap(2,2)"  desc=0x60042f68 _enable_shared_pool_durations:?????????10g????shared pool duration??,?????sga_target?0?????false; ???10.2.0.5??cursor_space_for_time???true??????false,???10.2.0.5??cursor_space_for_time????? SQL> alter system set "_enable_shared_pool_durations"=false scope=spfile; System altered. SQL> SQL> startup force; ORACLE instance started. Total System Global Area 1048576000 bytes Fixed Size                  2101544 bytes Variable Size             738201304 bytes Database Buffers          301989888 bytes Redo Buffers                6283264 bytes Database mounted. Database opened. SQL> oradebug setmypid; Statement processed. SQL> oradebug dump heapdump 2; Statement processed. SQL> oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_12233.trc SQL> SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options\ [oracle@vrh8 dbs]$ grep "sga heap"   /s01/admin/G10R25/udump/g10r25_ora_12233.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x60036690 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003feb8 ??:1._kghdsidx_count ??? shared pool subpool???, _kghdsidx_count???????7 ??? 7? shared pool subpool 2.??????? subpool???4? sub partition ?: sga heap(1,0) sga heap(1,1) sga heap(1,2) sga heap(1,3) ????? cpu??? ?????_kghdsidx_count, ???? ?10g ?AUTO SGA ??? shared pool duration???, duration ??4?: Session duration Instance duration (never freed) Execution duration (freed fastest) Free memory ??? shared pool duration???? ?10gR1?Shared Pool?shrink??????????,?????????????Buffer Cache???????????granule,????Buffer Cache?granule????granule header?Metadata(???buffer header??RAC??Lock Elements)????,?????????????????????shared pool????????duration(?????)?chunk??????granule?,????????????granule??10gR2????Buffer Cache Granule????????granule header?buffer?Metadata(buffer header?LE)????,??shared pool???duration?chunk????????granule,??????buffer cache?shared pool??????????????10gr2?streams pool?????????(???????streams pool duration????) reference : http://www.oracledatabase12g.com/archives/understanding-automatic-sga-memory-management.html

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  • SQL – What ACID stands in the Database? – Contest to Win 24 Amazon Gift Cards and Joes 2 Pros 2012 Kit

    - by Pinal Dave
    We love puzzles. One of the brain’s main task is to solve puzzles. Sometime puzzles are very complicated (e.g Solving Rubik Cube or Sodoku)  and sometimes the puzzles are very simple (multiplying 4 by 8 or finding the shortest route while driving). It is always to solve puzzle and it creates an experience which humans are not able to forget easily. The best puzzles are the one where one has to do multiple things to reach to the final goal. Let us do something similar today. We will have a contest where you can participate and win something interesting. Contest This contest have two parts. Question 1: What ACID stands in the Database? This question seems very easy but here is the twist. Your answer should explain minimum one of the properties of the ACID in detail. If you wish you can explain all the four properties of the ACID but to qualify you need to explain minimum of the one properties. Question 2: What is the size of the installation file of NuoDB for any specific platform. You can answer this question following format – NuoDB installation file is of size __ MB for ___ Platform. Click on the Download the Link and download your installation file for NuoDB. You can post figure out the file size from the properties of the file. We have exciting content prizes for the winners. Prizes 1) 24 Amazon Gift Cards of USD 10 for next 24 hours. One card at every hour. (Open anywhere in the world) 2) One grand winner will get Joes 2 Pros SQL Server 2012 Training Kit worth USD 249. (Open where Amazon ship books). Amazon | 1 | 2 | 3 | 4 | 5  Rules The contest will be open till July 21, 2013. All the valid comments will be hidden till the result is announced. The winners will be announced on July 24, 2013. Hint: Download NuoDB  Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Puzzle, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • SQL SERVER – Weekly Series – Memory Lane – #003

    - by pinaldave
    Here is the list of curetted articles of SQLAuthority.com across all these years. Instead of just listing all the articles I have selected a few of my most favorite articles and have listed them here with additional notes below it. Let me know which one of the following is your favorite article from memory lane. 2006 This was the first year of my blogging and lots of new things I was learning as I go. I was indeed an infant in blogging a few years ago. However, as time passed by I have learned a lot. This year was year of experiments and new learning. 2007 Working as a full time DBA I often encoutered various errors and I started to learn how to avoid those error and document the same. ERROR Msg 5174 Each file size must be greater than or equal to 512 KB Whenever I see this error I wonder why someone is trying to attempt a database which is extremely small. Anyway, it does not matter what I think I keep on seeing this error often in industries. Anyway the solution of the error is equally interesting – just created larger database. Dilbert Humor This was very first encounter with database humor and I started to love it. It does not matter how many time we read this cartoon it does not get old. Generate Script with Data from Database – Database Publishing Wizard Generating schema script with data is one of the most frequently performed tasks among SQL Server Data Professionals. There are many ways to do the same. In the above article I demonstrated that how we can use the Database Publishing Wizard to accomplish the same. It was new to me at that time but I have not seen much of the adoption of the same still in the industry. Here is one of my videos where I demonstrate how we can generate data with schema. 2008 Delete Backup History – Cleanup Backup History Deleting backup history is important too but should be done carefully. If this is not carried out at regular interval there is good chance that MSDB will be filled up with all the old history. Every organization is different. Some would like to keep the history for 30 days and some for a year but there should be some limit. One should regularly archive the database backup history. South Asia MVP Open Days 2008 This was my very first year Microsoft MVP. I had Indeed big blast at the event and the fun was incredible. After this event I have attended many different MVP events but the fun and learning this particular event presented was amazing and just like me many others are not able to forget the same. Here are other links related to the event: South Asia MVP Open Day 2008 – Goa South Asia MVP Open Day 2008 – Goa – Day 1 South Asia MVP Open Day 2008 – Goa – Day 2 South Asia MVP Open Day 2008 – Goa – Day 3 2009 Enable or Disable Constraint  This is very simple script but I personally keep on forgetting it so I had blogged it. Till today, I keep on referencing this again and again as sometime a very little thing is hard to remember. Policy Based Management – Create, Evaluate and Fix Policies This article will cover the most spectacular feature of SQL 2008 – Policy-based management and how the configuration of SQL Server with policy-based management architecture can make a powerful difference. Policy based management is loaded with several advantages. It can help you implement various policies for reliable configuration of the system. It also provides additional administrative assistance to DBAs and helps them effortlessly manage various tasks of SQL Server across the enterprise. SQLPASS 2009 – My Very First SQPASS Experience Just Brilliant! I never had an experience such a thing in my life. SQL SQL and SQL – all around SQL! I am listing my own reasons here in order of importance to me. Networking with SQL fellows and experts Putting face to the name or avatar Learning and improving my SQL skills Understanding the structure of the largest SQL Server Professional Association Attending my favorite training sessions Since last time I have never missed a single time this event. This event is my favorite event and something keeps me going. Here are additional post related SQLPASS 2009. SQL PASS Summit, Seattle 2009 – Day 1 SQL PASS Summit, Seattle 2009 – Day 2 SQL PASS Summit, Seattle 2009 – Day 3 SQL PASS Summit, Seattle 2009 – Day 4 2010 Get All the Information of Database using sys.databases Even though we believe that we know everything about our database, we do not know a lot of things about our database. This little script enables us to know so many details about databases which we may not be familiar with. Run this on your server today and see how much you know your database. Reducing CXPACKET Wait Stats for High Transactional Database While engaging in a performance tuning consultation for a client, a situation occurred where they were facing a lot of CXPACKET Waits Stats. The client asked me if I could help them reduce this huge number of wait stats. I usually receive this kind of request from other client as well, but the important thing to understand is whether this question has any merits or benefits, or not. I discusses the same in this article – a bit long but insightful for sure. Error related to Database in Use There are so many database management operations in SQL Server which requires exclusive access to the database and it is not always possible to get it. When any database is online in SQL Server it either applications or system thread often accesses them. This means database can’t have exclusive access and the operations which required this access throws an error. There is very easy method to overcome this minor issue – a single line script can give you exclusive access to the database. Difference between DATETIME and DATETIME2 Developers have found the root reason of the problem when dealing with Date Functions – when data time values are converted (implicit or explicit) between different data types, which would lose some precision, so the result cannot match each other as expected. In this blog post I go over very interesting details and difference between DATETIME and DATETIME2 History of SQL Server Database Encryption I recently met Michael Coles and Rodeney Landrum the author of one of the kind book Expert SQL Server 2008 Encryption at SQLPASS in Seattle. During the conversation we ended up how Microsoft is evolving encryption technology. The same discussion lead to talking about history of encryption tools in SQL Server. Michale pointed me to page 18 of his book of encryption. He explicitly gave me permission to re-produce relevant part of history from his book. 2011 Functions FIRST_VALUE and LAST_VALUE with OVER clause and ORDER BY Some time an interesting feature and smart audience make a total difference in places. From last two days, I have been writing on SQL Server 2012 feature FIRST_VALUE and LAST_VALUE. I created a puzzle which was very interesting and got many people attempt to resolve it. It was based on following two articles: Introduction to FIRST_VALUE and LAST_VALUE Introduction to FIRST_VALUE and LAST_VALUE with OVER clause I even provided the hint about how one can solve this problem. The best part was many people solved the problem without using hints! Try your luck!  A Real Story of Book Getting ‘Out of Stock’ to A 25% Discount Story Available This is a great problem and everybody would love to have it. We had it and we loved it. Our book got out of stock in 48 hours of releasing and stocks were empty. We faced many issues and learned many valuable lessons. Some we were able to avoid in the future and some we are still facing it as those problems have no solutions. However, since that day – our books never gone out of stock. This inspiring learning story for us and I am confident that you will love to read it as well. Introduction to LEAD and LAG – Analytic Functions Introduced in SQL Server 2012 SQL Server 2012 introduces new analytical function LEAD() and LAG(). This function accesses data from a subsequent row (for lead) and previous row (for lag) in the same result set without the use of a self-join . It will be very difficult to explain this in words so I will attempt small example to explain you this function. I had a fantastic time writing this blog post and I am very confident when you read it, you will like the same. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Memory Lane, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Android - BroadcastReceiver CONNECTIVITY ACTION

    - by Marc Ortiz
    in my project there's a service that listens for changes in the connectivity. When wifi is switched off to on then it gets called. The problem it's that i'm using a fragment and inside a fragment there's a button with the setonclicklistener(); and onclick(); SOMETIMES when i touch the button then the service receives an intent that the connectivity has changed (the method gets called without any reason...). Here's the code of my fragment activity for the viewpager layout: public static class FragmentSelection extends Fragment { int mNum; static FragmentSelection newInstance(int num) { FragmentSelection f = new FragmentSelection(); // Supply num input as an argument. Bundle args = new Bundle(); args.putInt("num", num); f.setArguments(args); return f; } /** * When creating, retrieve this instance's number from its arguments. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mNum = (getArguments() != null ? getArguments().getInt("num") : 1) + 1; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { final View v = inflater.inflate(R.layout.fragment_intro_contenido, container, false); Button btStart = (Button) v.findViewById(R.id.btChanged); final CheckBox cbSMS = (CheckBox) v.findViewById(R.id.checkBoxSms); final CheckBox cbCalls = (CheckBox) v .findViewById(R.id.checkBoxLlamadas); final CheckBox cbApps = (CheckBox) v .findViewById(R.id.checkBoxApps); final CheckBox cbPosition = (CheckBox) v .findViewById(R.id.checkBoxPosicion); final CheckBox cbContacts = (CheckBox) v .findViewById(R.id.checkBoxContactos); final CheckBox cbAll = (CheckBox) v.findViewById(R.id.checkBoxAll); cbSMS.setChecked(true); cbCalls.setChecked(true); cbApps.setChecked(true); cbPosition.setChecked(true); cbContacts.setChecked(true); cbAll.setChecked(true); btStart.setOnClickListener(new View.OnClickListener() { public void onClick(View c) { Intent i = new Intent(); i.setClass(v.getContext(), AnonymeActivity.class); if (!cbSMS.isChecked()) { i.putExtra("sms", 0); } else { i.putExtra("sms", 1); } if (!cbCalls.isChecked()) { i.putExtra("calls", 0); } else { i.putExtra("calls", 1); } if (cbContacts.isChecked()) { i.putExtra("contacts", 1); } else { i.putExtra("contacts", 0); } if (cbApps.isChecked()) { i.putExtra("apps", 1); } else { i.putExtra("apps", 0); } if (!cbPosition.isChecked()) { i.putExtra("gps", 0); } else { i.putExtra("gps", 1); } if (!cbAll.isChecked()) { if (cbSMS.isChecked() && cbCalls.isChecked() && cbContacts.isChecked() && cbApps.isChecked() && cbPosition.isChecked()) { i.putExtra("all", 1); } else { i.putExtra("all", 0); } } else { i.putExtra("all", 1); } startActivity(i); } }); return v; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); } } My BroadcastReceiver class: class Broadcast_Reciver extends BroadcastReceiver implements Variables { CheckConexion cc; @Override public void onReceive(Context contxt, Intent intent) { // Cuando hay un evento, lo diferenciamos y hacemos una acción. if (intent.getAction().equals(SMS_RECEIVED)) { Sms sms = new Sms(null, contxt); sms.uploadNewSms(intent); } else if (intent.getAction().equals(Intent.ACTION_BATTERY_LOW)) { // st.batterylow(contxt); } else if (intent.getAction().equals(Intent.ACTION_POWER_CONNECTED)) { // st.power(1, contxt); } else if (intent.getAction().equals(Intent.ACTION_POWER_DISCONNECTED)) { // st.power(0, contxt); } else if (intent.getAction().equals(Intent.ACTION_CALL_BUTTON)) { // Notify } else if (intent.getAction().equals(Intent.ACTION_CAMERA_BUTTON)) { // Notify } else if (intent.getAction().equals(Intent.ACTION_PACKAGE_ADDED) || intent.getAction().equals(Intent.ACTION_PACKAGE_CHANGED) || intent.getAction().equals(Intent.ACTION_PACKAGE_REMOVED)) { Database db = new Database(contxt); if (db.open().Preferences(4)) { Uri data = intent.getData(); new ListApps(contxt).import_app(intent, contxt, data, intent.getAction()); } db.close(); } else if (intent.getAction().equals( ConnectivityManager.CONNECTIVITY_ACTION)) { cc = new CheckConexion(contxt); if (cc.isOnline()) { Database db = new Database(contxt); if (db.open().move() == 1) { new UploadOffline(contxt); } db.close(); } } } } And the errors: 9-03 23:20:37.887: E/SqliteDatabaseCpp(2715): CREATE TABLE android_metadata failed 09-03 23:20:37.887: E/SQLiteDatabase(2715): Failed to open the database. closing it. 09-03 23:20:37.887: E/SQLiteDatabase(2715): android.database.sqlite.SQLiteDatabaseLockedException: database is locked 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.database.sqlite.SQLiteDatabase.native_setLocale(Native Method) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.database.sqlite.SQLiteDatabase.setLocale_(SQLiteDatabase.java:2211) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.database.sqlite.SQLiteDatabase.setLocale(SQLiteDatabase.java:2199) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1130) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1081) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1167) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:833) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:221) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:157) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at com.background.Database.open(Database.java:127) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at <b><b><b><h3>com.background.Broadcast_Reciver.onReceive(BroadcastService.java:100)</h3> 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.os.Handler.handleCallback(Handler.java:605) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.os.Handler.dispatchMessage(Handler.java:92) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.os.Looper.loop(Looper.java:137) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at android.app.ActivityThread.main(ActivityThread.java:4507) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at java.lang.reflect.Method.invokeNative(Native Method) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at java.lang.reflect.Method.invoke(Method.java:511) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 09-03 23:20:37.887: E/SQLiteDatabase(2715): at dalvik.system.NativeStart.main(Native Method) 09-03 23:20:37.887: D/AndroidRuntime(2715): Shutting down VM 09-03 23:20:37.887: W/dalvikvm(2715): threadid=1: thread exiting with uncaught exception (group=0x40c3b1f8) 09-03 23:20:37.902: E/AndroidRuntime(2715): FATAL EXCEPTION: main 09-03 23:20:37.902: E/AndroidRuntime(2715): java.lang.RuntimeException: Error receiving broadcast Intent { act=android.net.conn.CONNECTIVITY_CHANGE flg=0x10000010 (has extras) } in com.background.Broadcast_Reciver@415203f8 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:737) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.os.Handler.handleCallback(Handler.java:605) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.os.Handler.dispatchMessage(Handler.java:92) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.os.Looper.loop(Looper.java:137) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.app.ActivityThread.main(ActivityThread.java:4507) 09-03 23:20:37.902: E/AndroidRuntime(2715): at java.lang.reflect.Method.invokeNative(Native Method) 09-03 23:20:37.902: E/AndroidRuntime(2715): at java.lang.reflect.Method.invoke(Method.java:511) 09-03 23:20:37.902: E/AndroidRuntime(2715): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 09-03 23:20:37.902: E/AndroidRuntime(2715): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 09-03 23:20:37.902: E/AndroidRuntime(2715): at dalvik.system.NativeStart.main(Native Method) 09-03 23:20:37.902: E/AndroidRuntime(2715): Caused by: android.database.sqlite.SQLiteDatabaseLockedException: database is locked 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.database.sqlite.SQLiteDatabase.native_setLocale(Native Method) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.database.sqlite.SQLiteDatabase.setLocale_(SQLiteDatabase.java:2211) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.database.sqlite.SQLiteDatabase.setLocale(SQLiteDatabase.java:2199) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1130) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1081) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1167) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:833) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:221) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:157) 09-03 23:20:37.902: E/AndroidRuntime(2715): at com.background.Database.open(Database.java:127) 09-03 23:20:37.902: E/AndroidRuntime(2715): at com.background.Broadcast_Reciver.onReceive(BroadcastService.java:100) 09-03 23:20:37.902: E/AndroidRuntime(2715): at android.app.LoadedApk$ReceiverDispatcher$Args.run(LoadedApk.java:728) 09-03 23:20:37.902: E/AndroidRuntime(2715): ... 9 more Checkout that the program goes into BroadcastReceiver class and i don't understand why!

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  • Optimal (Time paradigm) solution to check variable within boundary

    - by kumar_m_kiran
    Hi All, Sorry if the question is very naive. I will have to check the below condition in my code 0 < x < y i.e code similar to if(x > 0 && x < y) The basic problem at system level is - currently, for every call (Telecom domain terminology), my existing code is hit (many times). So performance is very very critical, Now, I need to add a check for boundary checking (at many location - but different boundary comparison at each location). At very normal level of coding, the above comparison would look very naive without any issue. However, when added over my statistics module (which is dipped many times), performance will go down. So I would like to know the best possible way to handle the above scenario (kind of optimal way for limits checking technique). Like for example, if bit comparison works better than normal comparison or can both the comparison be evaluation in shorter time span? Other Info x is unsigned integer (which must be checked to be greater than 0 and less than y). y is unsigned integer. y is a non-const and varies for every comparison. Here time is the constraint compared to space. Language - C++. Now, later if I need to change the attribute of y to a float/double, would there be another way to optimize the check (i.e will the suggested optimal technique for integer become non-optimal solution when y is changed to float/double). Thanks in advance for any input. PS : OS used is SUSE 10 64 bit x64_64, AIX 5.3 64 bit, HP UX 11.1 A 64.

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  • How to execute msdb.dbo.sp_start_job from a stored procedure in user database in sql server 2005

    - by Ram
    Hi Everyone, I am trying to execute a msdb.dbo.sp_start_Job from MyDB.dbo.MyStoredProc in order to execute MyJob 1) I Know that if i give the user a SqlAgentUser role he will be able to run the jobs that he owns (BUT THIS IS WHAT I OBSERVED : THE USER WAS ABLE TO START/STOP/RESTART THE SQL AGENT SO I DO NOT WANT TO GO THIS ROUTE) - Let me know if i am wrong , but i do not understand why would such a under privileged user be able to start/stop agents . 2)I know that if i give execute permissions on executing user to msdb.dbo.Sp_Start_job and Enable Ownership chaining or enable Trustworthy on the user database it would work (BUT I DO NOT WANT TO ENABLE OWNERSHIP CHAINING NOR TRUSTWORTHY ON THE USER DATABASE) 3)I this this can be done by code signing User Database i)create a stored proc MyDB.dbo.MyStoredProc ii)Create a certificae job_exec iii)sign MyDB.dbo.MyStoredProc with certificate job_exec iv)export certificate msdb i)Import Certificate ii)create a derived user from this certificate iii)grant authenticate for this derived user iv)grant execute on msdb.dbo.sp_start_job to the derived user v)grant execute on msdb.dbo.sp_start_job to the user executing the MyDB.dbo.MyStoredProc but i tried it and it did not work for me -i dont know which piece i am missing or doing wrong so please provide me with a simple example (with scripts) for executing msdb.dbo.sp_start_job from user stored prod MyDB.dbo.MyStoredProc using code signing Many Many Many Thanks in Advance Thanks Ram

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