Resetting Key Column Numeration from SQL Tables

I used a lot of fictitious data in order to test the code of my web site. But I noticed that when I deleted all fictitious data from the tables, the primary key columns keep creating automatically numbers that are above the last one before all data was erased instead of starting again from number 1. How do I reset this automatic numeration in order to restart from 1 again ?

You have to use the DBCC Checkpoint command

Refer this: http://www.sqlteam.com/item.asp?ItemID=8003

|||Check out BOL for DBCC CHECKIDENT command.|||

Another way to do this is to use Truncate Table Command rather than delete.

This will reset identity.