Primary-Key Auto assign with minimum available number

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SQL-Server-2005

My table values are follows.

Id(pk) Item
1 Laptop
2 Pendrive
5 Mouse
======================
When I insert a new item to the table, it should assign a No.3 as ID (ie.Miimum Number available).

Is there any way in the sql-server2005 to auto-assign the pk-field with minimum available number.
Now I am doing it programatically (in the button click event read all the ID from the table and computing this ID prgramatically and inserting new item with this ID.)
This may cause cuncurrency because there is gap for computation between fetching the value and inserting new item with this value

Posted 31-May-11 5:40am

SHAJANCHERIAN

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OriginalGriff · Answer 1 · 2011-05-31T06:01:00

No.
SQL server will always assign sequential numbers and will not automatically go back to "fill in the gaps".
The reasoning for this is that if you have other tables which referred to that ID previously, it is better to have them "hanging" with nothing to reference than to be automatically associated with a new record when it is created.