RE: [sqlite] how to do this case when?

[RB Smissaert]

Found this now:

UPDATE Table1 SET Field1 =
        (case when Field1 IN (SELECT Field1 FROM Table2)
        then
        (SELECT Field2 FROM Table2 WHERE Table1.Field1 = Table2.Field1)
        else
        Table1.Field1 end)

Have a feeling though that this can be shorter.

RBS


-----Original Message-----
From: RB Smissaert [mailto:[EMAIL PROTECTED] 
Sent: 31 January 2008 20:15
To: sqlite-users@sqlite.org
Subject: [sqlite] how to do this case when?

How do I alter this SQL, so that the original field remains the same when
there is no match? A case when else end should do it, but I can't get it
right.

UPDATE Table1 SET Field1 =
        (SELECT Field2 FROM Table2
        WHERE Table1.Field1 = Table2.Field1)

Thanks for any advice.

RBS



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