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Is it possible to truncate all tables without touching the constraints.
All the best
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By truncate do you mean delete records, but not the table itself? If there are constraints (for example table CUSTOMERS, which has records in SALES by a customer ID) you would have to delete the records from the child table (in this case SALES) first, then delete from the parent (in this case CUSTOMERS).
I have had this issue at work where we want to delete something, so we have to start with the "smallest child" and work our way up. If it's something you plan to do frequently then just write a stored procedure for it so you can run when necessary.
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I want truncate because it resets primary key identity as well.
Anyway I had some time to search on web and found a sp that drops the foreign keys, truncates the tables and re-creates them. It is very cleaverly written.
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It can't be done simply, any table without an key can be truncated and use the following if there is a key
DELETE FROM TableName
DBCC CHECKIDENT (TableName, reseed, 1)
this will have the same effect as truncate. It will only work if there is no DATA based on the foriegn key, it will not violate the referential integrity of the data.
I have a script that will clean out a database but it is hard coded for each application. It truncates all the non key table and then walks the key structure of the database manually.
You could write a script/app that walked the FK structure of a database and created a hierarchy tree based on the keys (this is what code generators do)
Never underestimate the power of human stupidity
RAH
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I needed to reset identities as well so, deletion was not enough for me...
But at the end I found a good sp that makes all I need.
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Hi
how can i set union constraint on a column using sql server management studion
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Ebube wrote: set union constraint
Union contraint ?
Education is not a way to escape poverty — it is a way of fighting it.
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CREATE PROCEDURE dbo.sp_GetNewestTemplates
AS
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'Joe Smith'
order by lastchange desc
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'Jane Smith'
order by lastchange desc
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'GI Jane'
order by lastchange desc
GO
WHY does that code give no errors but this does:
CREATE PROCEDURE dbo.sp_GetNewestTemplates
AS
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'Joe Smith'
order by lastchange desc
union
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'Jane Smith'
order by lastchange desc
union
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'GI Jane'
order by lastchange desc
GO
I need this to work! What am I missing, and how can I get around this ridiculously annoying error? All it says is "Error 156: Syntax error near union."
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what error are you getting ?
Vuyiswa Maseko,
Few companies that installed computers to reduce the employment of clerks have realized their expectations.... They now need more and more expensive clerks even though they call them "Developers" or "Programmers."
C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
http://www.vuyiswamaseko.somee.com
http://www.vuyiswamaseko.tiyaneProperties.co.za
vuyiswa@its.co.za
http://www.itsabacus.co.za/itsabacus/
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What happens when you remove the ORDER BY?
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The syntax works, but I have 3 disjoint selections as a result. I am looking to save one of the pieces of data in each row to a variable in VB.NET, if you can tell me how to do that without the union of the 3 results then that is fine. At the moment I don't know how
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The UNION concatenates the results, but you can use this result as if it were a query again, e.g.;
SELECT * FROM
(
SELECT TOP 1 [name] FROM sysobjects WHERE [name] LIKE ('sysh%')
UNION
SELECT TOP 2 [name] FROM sysobjects WHERE [name] LIKE ('sys%')
UNION
SELECT TOP 1 [name] FROM sysobjects WHERE [id] < 0
) AS myCTE ORDER BY [name]
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You are specifying ORDER BY too many times. You do not need to specify ORDER BY for each of the sub-queries; you only need to specify it once for the entire UNION result set.
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'Joe Smith'
union
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'Jane Smith'
union
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'GI Jane'
order by lastchange desc
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For Joe Smith, I have multiple rows that I want only the row that has both the name (WHERE TEMPLATEOWNER = 'Joe Smith') AND the row where the LASTCHANGE is the newest. So that first select should return the newest entry by Joe Smith. Then the second and third selects should find the one row that is the most recently updated by Jane and GI.
The way it stands now, query analyzer shows three disjoint results. I need a joint record set. The removal of the order by in each select breaks the function.
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Try this. It should do exactly what you want
Select * from (
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'Joe Smith'
order by lastchange desc
) d
union
Select * from (
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'Jane Smith'
order by lastchange desc
) d
union
Select * from (
SELECT TOP 1 *
FROM TBL_SWBOM_CHECKLIST_TEMPLATES
WHERE TEMPLATEOWNER = 'GI Jane'
order by lastchange desc
) d
Wout Louwers
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just remove column name
in order by clause simly place column index .
Tauseef A Khan
MCP Dotnet framework 2.0.
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hi...
i m new to postgresql and i have work with mssql,oracle n mysql.
can any body tell me how to make stored procedure and where to put in postgresql?give me other options if available.
thnxs in advance.
!- F - R - I - E - N - D - S -!
modified on Tuesday, July 28, 2009 4:41 AM
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See ankur,
there are no stroed procedure in postgresql...
I have search all the topics on postgresql and i found nothig about stroed porcedure in postgresql...
But you can make your own functions and triggers...
Ok, Bye......
Hope you are satisfied with this answer.
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Hi To All....!
I have two stored procedure 1)sp_User_Master 2)sp_User_Detail. When I save data it first execute sp_User_Master stored procedure and then sp_User_Detail. Now these are two diffrent stored procedure and are executed one after another.
My Problem is when an error occurs in sp_User_Detail stored procedure i am unable to rollback the data saved using sp_User_Master. So is it possible to rollback the data saved by first executed stored procedure.
Please help.
Thanks to all.
.
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your code look like this:
try
{
begin tran
exec sp_User_Master
exec sp_User_Detail
commit tran
}
catch (Execption objException)
{
rollback transaction
}
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1. What database are you using?
2. What programming language are you using?
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I am Using SQL SERVER 2005 and C SHARP.NET
.
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Use a controller procedure and structured error handling technique.
The controller procedure will call the 2 procedures for data insertion and with structured error handling you can eassily RollBack the transaction if any of the procedure fails...
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