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  • Sort an array via x86 Assembly (embedded in C++)?? Possible??

    - by Mark V.
    I am playing around with x86 assembly for the first time and I can't figure out how to sort an array (via insertion sort).. I understand the algorithm, but assembly is confusing me as I primarily use Java & C++. Heres all I have so far int ascending_sort( char arrayOfLetters[], int arraySize ) { char temp; __asm{ push eax push ebx push ecx push edx push esi push edi //// ??? pop edi pop esi pop edx pop ecx pop ebx pop eax } } Basically nothing :( Any ideas?? Thanks in advance.

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  • SQL is this equivalent to a LEFT JoIn?

    - by Jim
    Is this equivalent to a LEFT JOIN? SELECT DISTINCT a.name, b.name FROM tableA a, (SELECT DISTINCT name FROM tableB) as b It seems as though there is no link between the two tables. Is there an easier / more efficient way to write this?

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  • Question about Benchmark function in Mysql ( Incredible results ).

    - by xRobot
    I have 2 tables: author with 3 millions of rows. book with 20 miles rows. . So I have benchmarked this query with a join: SELECT BENCHMARK(100000000, 'SELECT book.title, author.name FROM `book` , `author` WHERE book.id = author.book_id ') And this is the result: Query took 0.7438 sec ONLY 0.7438 seconds for 100 millions of query with a join ??? Do I make some mistakes or this is the right result ?

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  • SQL - when should you use "with (nolock)"

    - by Andy White
    Can someone explain the implications of using "with (nolock)" on queries, when you should/shouldn't use it? For example, if you have a banking application with high transaction rates and a lot of data in certain tables, in what types of queries would nolock be okay? Are there cases when you should always use it/never use it?

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  • [CakePHP] Dynamic fields on insert/edit form

    - by user198003
    hi all, let's say that i have 3 tables: books properties book_properties of course, i would like that when i want to insert new book (or update existing), to fill the form. fields that exist on form have to be defined as records in table properties. when i fill up those fields, data has to be saved in table book_properties. can you help me by giving some advices and references, how to achieve that? thank you very much in advance!

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  • Database design

    - by Hadad
    Hello, I've a system, that have two types of users (Companies and individuals).all types have a shared set of properties but they differ in another. What is the best design merge all in one table that allows null for unmatched properties, or separate them in two tables related to a basic table with a one to one relationship. Thanks.

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  • Dynamic Data - Make Friendly Column Names?

    - by davemackey
    I've created a Dynamic Data project with an Entity Framework model. It works nicely. But, right now it shows all my database tables with the db column names - which aren't always the most friendly (e.g. address_line_1). How can I got about giving these more friendly column titles that will display to the end user?

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  • SQLite Asp.net Path Problem

    - by drorhan
    when using data source=|DataDirectory|\mydb.sqlite in visual studio 2008 i can not see the tables in query builder and in dataset designer. How can i fix this? it is a web application for .net 3.5 thanks a lot

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  • What's the quickest way to dump & load a MySQL InnoDB database using mysqldump?

    - by Josh Schwartzman
    I would like to create a copy of a database with approximately 40 InnoDB tables and around 1.5GB of data with mysqldump and MySQL 5.1. What are the best parameters (ie: --single-transaction) that will result in the quickest dump and load of the data? As well, when loading the data into the second DB, is it quicker to: 1) pipe the results directly to the second MySQL server instance and use the --compress option or 2) load it from a text file (ie: mysql < my_sql_dump.sql)

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  • What Mysql query will return this result?

    - by Lost_in_code
    I have two tables A,B which are related to each other (simplified): A: +-------+---------+ | id | type | +-------+---------+ | 1 | apple | | 2 | orange | | 3 | banana | +-------+---------+ B: +-------+---------+-----------+ | id | a_id | rank | +-------+---------+-----------+ | 1 | 1 | 0.0 | | 2 | 1 | 7.7 | | 3 | 2 | 3.3 | | 4 | 2 | 8.8 | | 5 | 2 | 1.1 | | 6 | 3 | 3.3 | | 7 | 3 | 5.5 | | 8 | 1 | 9.5 | +-------+---------+-----------+ What mysql query will return the following result? Result +-------+---------+-----------+ | id | type | rank | +-------+---------+-----------+ | 1 | apple | 9.5 | | 2 | orange | 1.1 | | 3 | banana | 5.5 | +-------+---------+-----------+

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  • Mysql Left join with condition on column

    - by skicster
    Hi, can you help me with sql query? I have this problem: I have two tables "Join" table: Reservation_has_meal +----------------+ | id_reservation | | id_meal | | pieces | +----------------+ and table with data: Meal +-------------+ | id_meal | | name | +-------------+ Sample data for Meal: 1 | carrot 2 | potatoe 3 | cucumber Reservation_has_meal 1 | 2 | 5230 1 | 3 | 1203 How can I get this result for reservation with id_reservation=1: id_meal | id_Reservation | name | pcs | -------------------------------------------- 1 | 1 | carrot | null| 2 | 1 | potatoe | 5230| 3 | 1 | cucumber | 1203| -------------------------------------------- And result for id_reservation = 2: id_meal | id_Reservation | name | pcs | -------------------------------------------- 1 | 2 | carrot | null| 2 | 2 | potatoe | null| 3 | 2 | cucumber | null| -------------------------------------------- Thanks for advice.

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  • Subconic3.0 with winform app

    - by Saif Khan
    Can subsonic 3.0 be used with a winform app? Do I need to add any references to the system.web? If it can be done, how can I exclude certain tables in the DB? Can I use the following whih I am using for subsonic 2.0 <providers> <!--<clear/>--> <add name="TEST" type="SubSonic.SqlDataProvider, SubSonic" connectionStringName="myString" includeTableList="CustomerReference" includeProcedureList=""/> </providers>

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  • MySQL - Limit a left join to the first date-time that occurs?

    - by John M
    Simplified table structure (the tables can't be merged at this time): TableA: dts_received (datetime) dts_completed (datetime) task_a (varchar) TableB: dts_started (datetime) task_b (varchar) What I would like to do is determine how long a task took to complete. The join parameter would be something like ON task_a = task_b AND dts_completed < dts_started The issue is that there may be multiple date-times that occur after the dts_completed. How do I create a join that only returns the first tableB-datetime that occurs after the tableA-datetime?

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  • Assign query results to MySQL variable

    - by 5un5
    I'm querying a big mysql database with only read privileges, and I'd like to set some slow query results to a variable, 'foo', so I can use them again in other queries. I get, ERROR 1193 (HY000): Unknown system variable '$foo' when I enter: set $foo := (select * from table1 join table2 where bar = 0 group by id); Is there a way to do this with variables, since I don't have privileges to create temporary tables?

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  • InnoDB table locks without apparent reason

    - by Skreo
    Hi, I have an InnoDB table for visitors' counting, which has perfectly worked for several years, but it failed twice yesterday, may be cause of the increase of visitors Without apparent reason, this table locked, with hundreds of DELETE an REPLACE INTO queries (+500) with "updating" or "cleaning up" status. (I've no more the copy of the processlist...) This table contains few entries, between 500 and 1500, so the updating queries are usualy very fast and don't lock. I don't know where I must search to find the cause of this problem and resolve it definitively. But I guess this could give you a better vision of the problem : mysql> show global status like "%innodb_row_lock%"; +-------------------------------+-----------+ | Variable_name | Value | +-------------------------------+-----------+ | Innodb_row_lock_current_waits | 0 | | Innodb_row_lock_time | 132004175 | | Innodb_row_lock_time_avg | 10521 | | Innodb_row_lock_time_max | 59373 | | Innodb_row_lock_waits | 12546 | +-------------------------------+-----------+ 5 rows in set (0.00 sec) Sorry for my poor english, and thanks for your help ;-)

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  • SSRS Performance Mystery

    - by user101654
    I have a stored procedure that returns about 50000 records in 10sec using at most 2 cores in SSMS. The SSRS report using the stored procedure was taking 20min and would max out the processor on an 8 core server for the entire time. The report was relatively simple (i.e. no graphs, calculations). The report did not appear to be the issue as I wrote the 50K rows to a temp table and the report could display the data in a few seconds. I tried many different ideas for testing altering the stored procedure each time, but keeping the original code in a separate window to revert back to. After one Alter of the stored procedure, going back to the original code, the report and server utilization started running fast, comparable to the performance of the stored procedure alone. Everything is fine for now, but I am would like to get to the bottom of what caused this in case it happens again. Any ideas?

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  • Sql joining a table

    - by benjamin button
    I have a question regarding the Sql Joins. whenever we join two different tables on some fields. what will happen exactly inside oracle which will result in the query output. will there be a temporary table created just for presenting the query output.

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  • Help with query in Microsoft Access

    - by Gold
    I have 2 tables: Table A: code | name Table B: barcode | name Table B has full barcode and name, Table A has only code. I need to run update query that fill name in Table A. I tried something like: update A set name = (select top 1 Name from B where B.Code = mid(A.Barcode,1,8)) but it doesn't work.

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  • How to disable multiple form submit (POST) in IIS

    - by user1209640
    We had a major SharePoint outage a few months back because a user wedged their keyboard in such a way as to cause the Enter button to be pressed indefinitely. The user was on a customized people search page and hundreds of POSTs by the same user were submitted asynchronously, which overloaded the server. Because I work in a large organization, I am looking for a more global way to prevent this from happening. Is there a way to prevent multiple web form submissions by a common user within a short period of time within IIS? I am aware we can write javascript to disable the button after it is clicked, but we are hoping to prevent this issue from occurring on other pages where a similar possibility may exist. Update: It appears looking at the source code, the javascript is performing a document.location = url, whenever keycode 13 (Enter) is pressed. Again, we can write JS to prevent this in this location, but we also want to be able to guard against this kind of issue more generally... preferably at the IIS level.

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