Try to check first the constraints of the columns in your table, then, move forward. or you might want to DROP and CREATE a new table to test..

Regards,
Ruther Roque

Answer is 11

CREATE TABLE [dbo].[TestTable](
[ID] [int] IDENTITY(11,1) NOT NULL,
[var] [nchar](10) NULL
) ON [PRIMARY]
GO

INSERT INTO [TestTable]
VALUES (‘val’)

SELECT *
FROM [TestTable]
—————————————————————————————–
DBCC CHECKIDENT (‘TestTable’, RESEED, 1)

INSERT INTO [TestTable]
VALUES (‘val’)

SELECT *
FROM [TestTable]
—————————————————————————————–

TRUNCATE TABLE [TestTable]

INSERT INTO [TestTable]
VALUES (‘val’)

SELECT *
FROM [TestTable]

—————————————————————————————–

When a reseed is applied before a truncate, the truncate will reset the counter for the column to the (original) seed of the column, not the reseed of the colum as this no longer exists.

In answer to Debashis, DELETE does not do the same as truncate, it maintains the current seed. Truncate is more efficent than delete but in order to get back to the last seed (as with DELETE) a reseed would be needed after the TRUNCATE.

http://msdn.microsoft.com/en-us/library/aa258817(v=sql.80).aspx

“The current identity value is set to the new_reseed_value. If no rows have been inserted to the table since it was created, the first row inserted after executing DBCC CHECKIDENT will use new_reseed_value as the identity. Otherwise, the next row inserted will use new_reseed_value + 1. If the value of new_reseed_value is less than the maximum value in the identity column, error message 2627 will be generated on subsequent references to the table.”

http://msdn.microsoft.com/en-us/library/aa260621(v=sql.80).aspx

“TRUNCATE TABLE removes all rows from a table, but the table structure and its columns, constraints, indexes and so on remain. The counter used by an identity for new rows is reset to the seed for the column. If you want to retain the identity counter, use DELETE instead.”

Fun:

USE [TempDB]
GO
– Create Table
CREATE TABLE [dbo].[TestTable]( [ID] [int] IDENTITY(11,1) NOT NULL,
[var] [nchar](10) NULL
) ON [PRIMARY]
GO

– Build sample data
INSERT INTO [TestTable]
VALUES (‘val’)
GO

– Reseed
DBCC CHECKIDENT (‘TestTable’, RESEED, 600)
GO

–play here, try with and without ——
– Truncate table
TRUNCATE TABLE [TestTable]
GO
—–
– Put sample data in again
INSERT INTO [TestTable]
VALUES (‘val’)
GO

– Select Data
SELECT *
FROM [TestTable]
GO

– Clean up
DROP TABLE [TestTable]
GO

create table dbo.sale
1,’anday’,61,1000
2,’rachod’,34,2000
5,’chris’,24,3000
7,’corms’,41,4000
8,’ross’,57,5000
9,’joe’,38,6000

create table dbo.client
4,’pizza’,'holland’,'f&b’
5,’domino’,'chicago’,'f&b’
7,’pizzacornar’,'newyork’,'f&b’
9,’papa johns’,'miching’,'f&b’

create table dbo.orders
10,’8/2/96′,4,2,540
20,’1/30/99′,4,8,1800
30,’7/14/95′,9,1,460
40,’1/29/98′,7,2,2400
50,’2/3/98′,6,7,600
60,’3/2/98′,6,7,720
70,’5/6/98′,9,7,150
60,’3/2/98′,6,7,720

please answer for this questions.

1. names of all saleperson who have an order with dominos
2. the names all saleperson who do not have any order with Dominos& papa johns
3. the names of sales person that have 2 or more orders worth $150
4. write sql trigger to insert rows into a table called higher
achiever (names,age)
when a sale person sales amount gooes abouve $500

5. write queries to delete any duplicate rows the orders table

6. names of the saleperson who have not made any sales or sales less
then $50 in each year

explain it

INSERT INTO #RESEED (NAME) VALUES (‘A’)

SELECT * FROM #RESEED

TRUNCATE TABLE #RESEED

DBCC CHECKIDENT(‘#RESEED’, RESEED,1)

INSERT INTO #RESEED (NAME) VALUES (‘A’)

SELECT * FROM #RESEED

The Seed value should be : 1

Great Blog, keep up the good work!

thanks, it’s very good blog

Thank for Knowledge Sharing :)

Thanks a lot for this post.

Answer: After Truncate command DBCC RESEED will not work, so the reseed value would be 11 i.e. original value instead of 1.which has been reseed by DBCC RESEED Command.

Thanks for this article really it good. It clears my some doubts.

Answer of your question is : If we call Truncate after Reseed command then the Identity will be changed to initial value means the Identity reset to 11.