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• PL/SQL time segment calculation

  - by Steve

  Hi, I need to figure how much time passed between 2 times. For example: (14:00:00 - 13:15:00) * 24 = .75 I need this to later on convert KW to KWh, but that's not the point. I can not find out how to do this in PL/SQL. My date/time fields look like this in the DB: 1/23/2010 21:00:00 I would appreciate any suggestions. Steve

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• change string in mssql to abbreviate

  - by jeff

  How do I return the everything in a string from a sql query before a certain character? My data looks like this: HD TV HM45VM - HDTV widescreen television set with 45" lcd I want to limit or truncate the string to include everything before the dash. So the final result would be "HD TV HM45VM"

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• Basic SQL Select in Postgresql fails

  - by Rhubarb

  I am doing a select * on a postgresql table, and everything looks good. But if I do: SELECT Name from People It says: ERROR: column People.Name does not exist SQL state: 42703 Character: 8 But the name column shows up during select *. I've tried: SELECT People.Name from People as well, with the same result. Am I missing something? It should be pretty easy to do this in any other database.

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• SQL Server 2005 Performance Dashboard Missing Index

  - by n8wrl

  I am using the performance dashboard with our SQL Server 2005 databases and it lists what it considers to be missing indexes. But some of those indexes DO exist! They are not disabled, and they are defined exactly as the dashboard says they should be. Why are they reported as missing?

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• Can Entity Framework model be passed a SQL script to be run against the database

  - by Greg

  Is it possible to pass a SQL script to some method that Entity Framework has to run it against my model? e.g. equivalent of: context.ExecuteStoreCommand(<tsql script path>); Background: I want a way to reset the database during unit tests, and making a call to run the EF generated TSQL script (from Generate Database from Model) seems one way to achieve this.

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• Does MySql have Server Management Objects equivalent to MSSql?

  - by dboarman-FissureStudios

  I am looking for resources and references for a MySql equivalent to MSSql SMO. Also, is SMO the newest technology for programmatic management of Sql server?

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• How Can I do this??

  - by ramadan2050

  I have a table records(ID, ParentID) containg this data ID ParentID 1 null 2 1 3 2 3 4 4 5 6 null 7 6 If you draw this table in hierarchy as a family 1,2,3,4,5 will be related to each other. I want to find a way, where I can pass an ID like 3 it give me the others family members using SQL or using C# 3 - result 1,2,4,5 2 - result 1,3,4,5 6 - result 7 and so on I want to find my parent and his parents and childs and my child and his childs LIKE THE EXAMPLES

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• sql conditional union on rowcount

  - by Stavros

  I have an SQL function which returns a list of Teams. I want to join an additional list to that list with a union, but only if it returns more than one rows. Something like: CREATE FUNCTION Teams() RETURNS TABLE AS RETURN ( SELECT * FROM TABLE1 UNION if @@rowcount>1 SELECT * FROM TABLE2 end if )

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• How to make a trasanction cover several stored procedure ?

  - by Bitnius

  I need to include several stored procedure in a single transaction in a single database, if any of stored procedure fail then roll back transaction of all stored procedure procesed in the scope. I work with SQL-SERVER 2008

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• LINQ to SQL entity and data-context classes: business object encapsulation

  - by roosteronacid

  What are your favorite ways to encapsulate LINQ to SQL entity classes and data-context classes into business objects? What have you found to work in a given situation? Have you invented or taken to any specific patterns?

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• Converting a certain SQL query into relational algebra

  - by Fumler

  Just doing an assignment for my database course and I just want to double check that I've correctly wrapped my head around relational algebra. The SQL query: SELECT dato, SUM(pris*antall) AS total FROM produkt, ordre WHERE ordre.varenr = produkt.varenr GROUP BY dato HAVING total >= 10000 The relational algebra: stotal >= 10000( ?R(dato, total)( sordre.varenr = produkt.varenr( datoISUM(pris*antall(produkt x ordre)))) Is this the correct way of doing it?

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• Sql query Error: Operand should contain 1 column(s) in rails

  - by dombesz

  Hi everyone, SELECT * FROM jobs WHERE (SELECT DISTINCT jobs.* FROM jobs, job_requests WHERE (jobs.user_id = 1) OR (job_requests.user_id = 1 AND job_requests.job_id = jobs.id)) This sql gives me Mysql::Error: Operand should contain 1 column(s). If i execute the select from the where clause it works SELECT DISTINCT jobs.* FROM jobs, job_requests WHERE (jobs.user_id = 1) OR (job_requests.user_id = 1 AND job_requests.job_id = jobs.id) Could somebody explain me why? This query is generated by rails activerecord so the main select is needed.

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• Long time to load first sql connection in C# .NET

  - by Shrage Smilowitz

  For some reason it takes 7 seconds to open a connection to a sql server database for the firt time, subsequent connections takes a second. any idea what could be the reason? I'm using C# and asp.net

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• SQL Server: how can I know my stored procedure is optimum in performance

  - by RedsDevils

  Hi all, I would like to know how to measure/know that one's stored procedure is optimum in performance. That stored procedure can be inserting/deleting/updating or manipulating data in that procedure. Please describe the way/approach how to know performance in SQL Server. Thanks in advance!

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• SQL Job: CmdExec with Multiple Arguments

  - by Vilasack Phothisan

  Is it possible to specify two arguments to CmdExec in SQL JOb Step? I have MyApp.exe Para1 Para2 but it only recognize para1.

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• Is PDO for SQL Server support query contain Link Server

  - by Permana

  Is PDO for SQL Server support query contain Link Server ? I try using mssql_connect but it didn't work. I have try PDO but it alwas return error on query() method.

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• Upload a file to sql database with delphi and after download

  - by Rapunzo

  I am working to make a basic file database, but I couldn't find the true codes. Can anyone help me to save an exe file to sql database after read, download and use when I need it? With Delphi

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• SQL Server hosting

  - by user182945

  Do you know any cheap SQL Server 2008 hosting service. (I need to host a db that is going to be < 100 MB)?

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• Refactoring SQL

  - by Mongus Pong

  Are there any formal techniques for refactoring SQL similar to this list here that is for code? I am currently working on a massive query for a particular report and I'm sure there's plenty of scope for refactoring here which I'm just stumbling through myself bit by bit.

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• Why is the ( ) mandatory in the SQL statement select * from gifts INNER JOIN sentgifts using (giftID

  - by Jian Lin

  Why is the ( ) mandatory in the SQL statement select * from gifts INNER JOIN sentgifts using (giftID); ? The ( ) usually is for specifying grouping of something. But in this case, are we supposed to be able to use 2 or more field names... in the example above, it can be all clear that it is 1 field, is it just that the parser is not made to bypass the ( ) when it is all clear? (such as in the language Ruby).

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• Write a plugin/form for SQL server enterprise manager

  - by Daniil

  Is it possible to write a plugin or a form for SQL Server Enterprise Manager version 8? I'm doing some simple queries all the time to admin the databases. So wondering if I could write something for it.

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• Storing unicode strings to SQL Server via ActiveRecord

  - by ripper234

  I am using Castle ActiveRecord as my ORM. When I try to store unicode strings, I get question marks instead. Saving unicode strings worked perfectly when I was using mysql, but when I recently switch to SQL Server it broke. How should I go about fixing this?

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• Generate table relationship diagram from existing schema (SQL Server)

  - by Nick

  Is there a tool around that would produce a diagram showing existing tables and their relationships given a connection to a database or by any other means? This is for SQL Server 2008 Express Edition.

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• MS SQL and Indentity column

  - by andrew007

  Hi, I just noticed that if I have an identity column in a table, when I insert new rows MS SQL 2008 is automatically filling up the sequence if there are discontinuity. I mean, if in my identity column I have 1,2,5,6 if I insert other two rows in the table the system puts automatically 3,7 in the identity column. Do you know how to control this behavior? THANKS

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• Use Tablediff to compare all tables

  - by Davie

  Hi, I have recently discovered the tablediff utility of SQL Server 2005. I have 2 instances of the same database each on a different server. Is it possible to compare all tables using tablediff without having to replicate the same command while only changing the table name? For example, compare table1 on server1 with table1 on server2 then compare table2 on server1 with table2 on server2, until all tables have been compared.

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