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• SQL: join within same table with different 'where' clause

  - by Pmarcoen

  Ok, so the problem I'm facing is this, I have a table with 3 columns : ID, Key and Value. ID | Key | Value ================ 1 | 1 | ab 1 | 2 | cd 1 | 3 | ef 2 | 1 | gh 2 | 2 | ij 2 | 3 | kl Now I want to select the value of Keys 1 & 3 for all IDs, the return should be like this ID | 1 | 2 ================ 1 | ab | ef 2 | gh | kl So per ID 1 row containing the Values for Keys 1 & 3. I tried using 'join' but since I need to use multiple where clauses I can't figure out how to get this to work ..

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• Getting past Salesforce trigger governors

  - by Jake

  I'm trying to write an "after update" trigger that does a batch update on all child records of the record that has just been updated. This needs to be able to handle 15k+ child records at a time. Unfortunately, the limit appears to be 100, which is so far below my needs it's not even close to acceptable. I haven't tried splitting the records into batches of 100 each, since this will still put me at a cap of 10k updates per trigger execution. (Maybe I could just daisy-chain triggers together? ugh.) Does anyone know what series of hoops I can jump through to overcome yet another ridiculously short-sighted limitation by this awful development "platform"?

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• [Alfresco] property qualified-name in method getContentReader

  - by Ar3s

  Hi there, I first apologize for my poor english level and maybe for the stupidity of my question ;) I am on an alfresco project to learn how it works. I have to browse programatically my content repository and gather datas all along. In order to do that I guessed I had to use a ContentReader (I get from my ContentService) but the method getReader wants a nodeRef and a propertyQualifiedName. I am ok with the nodeRef, I get what it's needed for. But the propertyQualifiedName puzzles me, I barely get what it is but I frankly don't get how it is used. Reading some alfresco forum threads I get more and more scared that I dont even get how a reader works, I somewhere saw that a reader can read only one node and only one time per instance. If anyone knows a bit about the Java API for Alfresco Content Repository use I am all hears ! Cheers all !

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• Text message (SMS) verification for signups

  - by Unknown

  I have seen a disturbing trend where websites are starting to require verification sent to cellphones by text message (SMS). Gmail and Facebook are two of them. What I want to know are the following: Is it a good idea to start requiring cellphones instead of emails now? How do I do it on my own website? Edit Here are some of my new questions on the topic in response to the answers: I see that most of you are saying that SMS registrations is ok. But what about the people who don't have cell phones? And why is it accepted to give out your cell phone information freely? Do those big providers really pay per message to a gateway service? Is it not possible to set up a server with the correct SMS software, or at least buy a subscription directly instead of having a middleman?

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• Zend Framework ErrorController not working on live site?

  - by firecall

  My site is set up pretty much as per the Zend Quickstart guide. The default ErrorController works locally using MAMP. But now I've deployed it to my live site I get a blank page and a "500 Internal Server Error" according to FireBug when I go to an action that doesnt exist. On my local server I get a 404 and a nicely formatted error page. Any ideas anyone? I dont really know where to begin looking. I'm confused :/ Thanks.

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• advice on setting up SVN

  - by Vivek Chandraprakash

  I'm trying to setup an svn server. I maintain couple of websites based on asp. There are three environments currently. Development: Any new modules/enhancements will be done in this environment Staging: Mirror of production Production: The public facing website. Currently when there's an update to the website, this is what we do do the update in development copy file to staging copy file to production In production we take a backup of the old file by renaming it. I would like to make it simpler by installing SVN and stop the file renaming thing. But im not sure how many repositories to have per website. should be it be three or two? I'm absolutely new to svn. Just installed it in a linux based server (ubuntu). Can you pls advice how to go about it? Thanks -Vivek

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• Saving html page from MATLAB web browser

  - by yuk

  Following this question I get a message on the retrieved page that "Your browser does not support JavaScript so some functionality may be missing!" If I open this page with web(url) in MATLAB web browser and accept certificate (once per session), the page opens properly. How can I save the page source from the browser with a script? Or from system browser? Or may be there is a way to get that page even without browser? url='https://cgwb.nci.nih.gov/cgi-bin/hgTracks?position=chr7:55054218-55242525';

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• Fastest way to calculate summary of database field

  - by Jo-wen

  I have a ms-sql table with the following structure: Name nvarchar; Sign nvarchar; Value int example contents: Test1, 'plus', 5 Test1, 'minus', 3 Test2, 'minus', 1 I would like to have totals per "Name". (add when sign = plus, subtract when sign = minus) result: Test1, 2 Test2, -1 I want to show these results (and update them when a new record is added)... and I'm looking for the fastest solution! [sproc? fast-forward cursor? calculate in .net?]

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• Code Golf: Phone Number to Words

  - by Nick Hodges

  Guidelines for code-golf on SO We've all seen phone numbers that are put into words: 1-800-BUY-MORE, etc. What is the shortest amount of code you can write that will produce all the possible combinations of words for a 7 digit US phone number. Input will be a seven digit integer (or string, if that is simpler), and assume that the input is properly formed. Output will be a list of seven character strings that For instance, the number 428-5246 would produce GATJAGM GATJAGN GATJAGO GATJAHM GATJAHN GATJAHO and so on..... Winning criteria will be code from any language with the fewest characters that produce every possible letter combination. Additional Notes: To make it more interesting, words can be formed only by using the letters on a North American Classic Key Pad phone with three letters per number as defined here.That means that Z and Q are excluded. For the number '1', put a space. For the number '0', put a hyphen '-' Bonus points awarded for recognizing output as real English words. Okay, not really. ;-)

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• SQl rows to columns conversion

  - by Thihara

  Hi, I have a table ClassAttendance and I'm using MSSQL 2005 studentID--attendanceDate---------------------------------------status 1004--------2010-03-17--------------------------------------------------0 1005--------2010-03-17--------------------------------------------------1 1006--------2010-03-17--------------------------------------------------0 1007--------2010-03-17--------------------------------------------------0 1004--------2010-03-19--------------------------------------------------0 1005--------2010-03-19--------------------------------------------------1 1006--------2010-03-19--------------------------------------------------0 1007--------2010-03-19--------------------------------------------------0 1004--------2010-03-20--------------------------------------------------1 as you can see studentID is a foreign Key for a table called StudentData and attendedDate has an unknown number of rows. Can i get the output like below by using a query? I need the dates in one month to be columns and the value of the date columns will be values in the status column. The number of date records per studentID is the same its the number of dates in the attendanceDate filed that is unknown. studentID---------2010-03-17--------2010-03-19------2010-03-20 1004-----------------------------0----------------------0--------------------1 etc. This is for a creating a report so I need to do it in a query. Please help if you can.

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• SSIS FTP Task problem with UNIX server

  - by andrew-bonn

  Hi, I would like to ask if there's a known issue with the FTP Task of SSIS 2005 on UNIX servers(HP UX B.11.23.). As per checking, we were able to ftp files on Windows Server but not on Unix. Though I can browse the ftp path of the UNIX server from my windows exlporer. I can even manually copy files. But when I tried uploading file thru SSIS FTP task, it does'nt work. Please help. Thanks.

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• C# printing by line to a passbook

  - by ryn6

  hi all! my question has something to do with printing. i was wondering how you could pass values to a printer. we are using a CRADEN DP4 printer which is used for passbooks for banks. i was wondering how could we print into a passbook using c# and the craden DP4 printer. i visited the manufacturer site and it does not have driver support for the said model. we want to print the details per line of the passbook.

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• Dynamically formatting a string

  - by TofuBeer

  Before I wander off and roll my own I was wondering if anyone knows of a way to do the following sort of thing... Currently I am using MessageFormat to create some strings. I now have the requirement that some of those strings will have a variable number of arguments. For example (current code): MessageFormat.format("{0} OR {1}", array[0], array[1]); Now I need something like: // s will have "1 OR 2 OR 3" String s = format(new int[] { 1, 2, 3 }); and: // s will have "1 OR 2 OR 3 OR 4" String s = format(new int[] { 1, 2, 3, 4 }); There are a couple ways I can think of creating the format string, such as having 1 String per number of arguments (there is a finite number of them so this is practical, but seems bad), or build the string dynamically (there are a lot of them so this could be slow). Any other suggestions?

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• Django Grouping Query

  - by Matt

  I have the following (simplified) models: class Donation(models.Model): entry_date = models.DateTimeField() class Category(models.Model): name = models.CharField() class Item(models.Model): donation = models.ForeignKey(Donation) category = models.ForeignKey(Category) I'm trying to display the total number of items, per category, grouped by the donation year. I've tried this: Donation.objects.extra(select={'year': "django_date_trunc('year', %s.entry_date)" % Donation._meta.db_table}).values('year', 'item__category__name').annotate(items=Sum('item__quantity')) But I get a Field Error on item__category__name. I've also tried: Item.objects.extra(select={"year": "django_date_trunc('year', entry_date)"}, tables=["donations_donation"]).values("year", "category__name").annotate(items=Sum("quantity")).order_by() Which generally gets me what I want, but the item quantity count is multiplied by the number of donation records. Any ideas? Basically I want to display this: 2010 - Category 1: 10 items - Category 2: 17 items 2009 - Category 1: 5 items - Category 3: 8 items

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• Delphi Clientdataset Lookup/Aggregate

  - by TheRoadrunner

  Hi, I need a little help with ClientDatasets in Delphi. What I want to achieve is a grid showing customers, where one of the columns shows the number of orders for each customer. I put a ClientDataset on a form and load Customers.xml from Delphi demo-data. Another ClienDataset is loaded with orders.xml. Relatively simple, I can define an aggregate on the orders CDS showing the total amount per customer (or the count). (See Cary Jensens article on this: http://edn.embarcadero.com/article/29272) The problem is getting this aggregate result from orders dataset into the customer dataset. It is kind of an reverse lookup, since there is a 1-n relationship between customers and orders, not an n-1 as normally in lookup scenarios. Any ideas ? Søren

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• Stop 2 identical queries from executing almost simultaneously?

  - by James Simpson

  I have developed an AJAX based game where there is a bug caused (very remote, but in volume it happens at least once per hour) where for some reason two requests get sent to the processing page almost simultaneously (the last one I tracked, the requests were a difference of .0001 ms). There is a check right before the query is executed to make sure that it doesn't get executed twice, but since the difference is so small, the check hasn't finished before the next query gets executed. I'm stumped, how can I prevent this as it is causing serious problems in the game. Just to be more clear, the query is starting a new round in the game, so when it executes twice, it starts 2 rounds at the same time which breaks the game, so I need to be able to stop the script from executing if the previous round isn't over, even if that previous round started .0001 ms ago.

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• COM+ Connection Pooling Doesn't Appear to be working on SQL Server 2005 Cluster

  - by kmacmahon

  We have a COM+ Data Layer that utilized Connection Pooling. Its deployed to 3 clusters, 2 SQL Server 2000 and 1 SQL Server 2005 environment. We noticed today that our monitoring software is reporting Thousands of Logins per minute on the SQL Server 2005 box. I did some tracing in both environments and profiler is reporting this for the 2000 boxes: sp_reset_connection SQL CALL sp_reset_connection SQL CALL sp_reset_connection SQL CALL and this for the 2005 box: Audit Logout sp_reset_connection Audit Login SQL CALL Audit Logout sp_reset_connection Audit Login SQL CALL Audit Logout sp_reset_connection Audit Login SQL CALL Is there some sort configuration for SQL Server 2005 different from SQL Server 2000 that we might be missing that would be creating this issue?

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• SQL 2005: Select top N, group by ID with joins

  - by Suzy Fresh

  I'm having real difficulty with a query involving 3 tables. I need to get the 3 newest users per department grouped by department names. The groups should be sorted by the users.dateadded so the department with the newest activity is first. The users can exist in multiple departments so Im using a lookup table that just contains the userID and deptID. My tables are as follows. Department - depID|name Users - userID|name|dateadded DepUsers - depID|userID The output I need would be Receiving John Doe - 4/23/2010 Bill Smith - 4/22/2010 Accounting Steve Jones - 4/22/2010 John Doe - 4/21/2010 Auditing Steve Jones - 4/21/2010 Bill Smith - 4/21/2010

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• (php) how to properly 'save' info in forms completed thus far

  - by hatorade

  So i have a form that on paper is 40 pages long. I was going to take the natural sections of this form, and make separate html forms for each section, with the idea that on the first page there would be a first form, then you hit 'Continue to next section' which essentially is the 'submit' button, which moves the user to section two, etc, until they hit the last section. i am not actually storing the results of the form in a database, but rather sending an email. the idea then is to store the separate form answers (one html form per section in the real form) as arrays or objects in the session, so that if they go back to a section in the form, it repopulates the values they entered since they are stored in the session. the result would be an array in the session storing the results for each of my forms, and i have one form for each section. my question is: is it secure to temporarily store things like SSNs or driver's license numbers as session variables? why or why not?

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• How do I throttle my site's API users?

  - by scotts

  The legitimate users of my site occasionally hammer the server with API requests that cause undesirable results. I want to institute a limit of no more than say one API call every 5 seconds or n calls per minute (haven't figured out the exact limit yet). I could obviously log every API call in a DB and do the calculation on every request to see if they're over the limit, but all this extra overhead on EVERY request would be defeating the purpose. What are other less resource-intensive methods I could use to institute a limit? I'm using PHP/Apache/Linux, for what it's worth.

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• mysql 2 primary key onone table

  - by Bharanikumar

  CREATE TABLE Orders -> ( -> ID SMALLINT UNSIGNED NOT NULL, -> ModelID SMALLINT UNSIGNED NOT NULL, -> Descrip VARCHAR(40), -> PRIMARY KEY (ID, ModelID) -> ); Basically May i know ... Shall we create the two primary key on one table... Is it correct... Bcoz as per sql law,,, We can create N number of unque key in one table, and only one primary key only is the LAW know... Then how can my system allowing to create multiple primary key ? Please advise .... what is the general rule

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• MySQL: Storage of multiple text fields for a record

  - by Tom

  An inexperienced question: I need to store about 10 unknown-length text fields per record into a MySQL table. I expect no more than 50K rows in total for this table but speed is important. The database actions will be solely SELECTs for all practical purposes. I'm using InnoDB. In other words: id | text1 | text2 | text3 | .... | text10 As I understand that MySQL will store the text elsewhere and use its own indicators on the table itself, I'm wondering whether there's any fundamental performance implications that I should be worrying about given the way the data is stored? (i.e. several "sub-fetches" from the table). Thank you.

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• Storing i18n data in a database using XML

  - by TigrouMeow

  Hello, I may have to store some i18n-ed data in my database using XML if I don't fight back. That's not my choice, but it's in the specifications I have to follow. We would have, by example, something like following in a 'Country' column: <lang='fr'>Etats-Unis</lang> <lang='en'>United States</lang> This would apply to many columns in the database. I don't think it's a good idea at all. I tend to think that a cell in a database should represent a single piece of data (better for look-up), and that the database should have two dimensions maximum and not 3 or more (one request more would be required per dimension / a dimension here would be equal to the number of XML attributes). My idea was to have a separate table for all the translations, with columns such as : ID / Language / Translation. However, I should admit that I'm really not sure what is the best way to store data in various languages in a DB... Thanks for your advices :)

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• Which build tool to teach?

  - by Helper Method

  While similiar questions have been asked, this one's focused on which is best/easiest to teach. I'm giving a weekly tutorial at my university focusing on data structures and algorithms. Fromn time to time I introduce tools which may prove helpful in future projects like JUnit, Mercurial, Eclipse etc.. I plan to show them some kind of build tool but I'm not sure which one to choose. I by myself have very little knowledge about build tools, except a little experience in using make. It's more the concept of a build tool I want to show them, not a special tool per se. Which would be the most easiest/future proof/whatever tool to show them? I've read a little bit about Gradle, which looks nice, but so far I think Ant could be a good choice (it's a Java course I'm giving).

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• Help Auditing in Oracle

  - by enrique

  Hello everybody I need some help in auditing in Oracle. We have a database with many tables and we want to be able to audit every change made to any table in any field. So the things we want to have in this audit are: user who modified time of change occurred old value and new value so we started creating the trigger which was supposed to perform the audit for any table but then had issues... As I mentioned before we have so many tables and we cannot go creating a trigger per each table. So the idea is creating a master trigger that can behaves dynamically for any table that fires the trigger. I was trying to do it but no lucky at all....it seems that Oracle restricts the trigger environment just for a table which is declared by code and not dynamically like we want to do. Do you have any idea on how to do this or any other advice for solving this issue? thanks in advance.

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