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DB2 and automated PK genearation..

Saniya Ansari
Ranch Hand

Joined: Sep 30, 2002
Posts: 48
Hi..
I'm using DB2 for a project.. I want to be able to genearate an automated PK which can just be a serial number like 1, 2,3.....
So I want to know that how can i do that with DB2
Secondly, When i insert I want to know what was the PK that was genearted.. so how can i do that.. like i'll execute the insert statement for example with a persons details.. a record is inserted and a pk is generated.. so how do i get that pk value..

Thanks..


SCJP 2
Jeanne Boyarsky
author & internet detective
Marshal

Joined: May 26, 2003
Posts: 31126
    
166

You can use an identity column.

Candle has a short example. (search for "identity" in the list of features.)


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Dana Hanna
Ranch Hand

Joined: Feb 28, 2003
Posts: 227
Note that this feature became available with DB2 version 7. DB2 5.2 and 6.1 have no method of automated key generation.
Saniya Ansari
Ranch Hand

Joined: Sep 30, 2002
Posts: 48
Thanks you guys.. one more part that i'm trying to figure out is that how do i get that key that was generated back.. bcoz usually in select we'll give the primary key and select a record.. i can i suppose make a query and put the rest of the fields for example name, address, phone, email to match with the record i just inserted and get its id but this sounds like a less efficient method.. are there any other ways someone can suggest...
the question is agand if i'm using an automated pk generated by db, after insert how do i get this pk back right after i have inserted the record...
Thankyou..
 
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