Question

clear contents of data table and reseed identity

Asked by: steelheart38

hi experts,

I wanted to make a stored procedure to clear contents of a table and reseed identity. something like
----------------
DELETE FROM myTable

DBCC CHECKIDENT(myTable,RESEED,0)
-----------------
But i wanted it to be generic (if thats the right term) wherein it accepts string table name for parameter and i didnt know how to put these things together. how do i do this?

I'm really new with SQL 2000, hope i could get some help on this.

thanks in advance

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Asked On
2005-11-16 at 12:00:53ID21633461
Tags

reseed

,

identity

,

table

Topic

MS SQL Server

Participating Experts
1
Points
500
Comments
4

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Answers

 

by: angelIIIPosted on 2005-11-16 at 12:04:09ID: 15306208

first, rather than using DELETE FROM, use TRUNCATE TABLE


you might try this:

create procedure reset_table ( @tablename sysname )
as
declare @sql varchar(600)
set @sql = 'TRUNCATE TABLE [' + @tablename +'] '
exec (@sql)
set @sql = 'DBCC CHECKIDENT( [' + @tablename +'], RESEED, 1) '
exec (@sql)
GO

note that I would use 1 as reseed value, unless you want 0 to be the value for the first row.

 

by: steelheart38Posted on 2005-11-16 at 12:28:37ID: 15306416

thanks, it was quite helpful

though, i could not delete some of the table because of a certain foreign key constraint. but if i use delete though it works. why is it so?

 

by: angelIIIPosted on 2005-11-16 at 12:36:40ID: 15306493

this is because truncate doesn't raise any triggers and constraints check, which is needed to ensure data integrity. the foreign key constraint to this table "disables" the truncate command for this purpose.

create procedure reset_table ( @tablename sysname )
as
declare @sql varchar(600)
set @sql = 'DELETE FROM [' + @tablename +'] '
exec (@sql)
set @sql = 'DBCC CHECKIDENT( [' + @tablename +'], RESEED, 1) '
exec (@sql)
GO

 

by: steelheart38Posted on 2005-11-16 at 12:37:51ID: 15306507

thanks a lot.. =)

20120131-EE-VQP-002

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