Re: [sqlite] INSERTing a row only if it doesn't EXIST
On Sep 17, 2005, at 4:35 PM, Alexander J. Kozlovsky wrote: I want to avoid doing a two step process outside the db... I want to insert a row only if it doesn't exist already. IMHO, if you table T1 have a unique key, you may do this INSERT OR IGNORE T1 VALUES(1, 2, 3); ahhh! the conflict algorithm. Thanks for drawing my attention to it... it should do the trick. -- Puneet Kishor
Re: [sqlite] INSERTing a row only if it doesn't EXIST
If id in your example identifies a row, then by definition it is unique (probably the primary key). If you try to insert another row with the same id, the insert will fail. Why not just catch the exception or error code? Regards
Re: [sqlite] INSERTing a row only if it doesn't EXIST
> I want to avoid doing a two step process outside the db... I want to > insert a row only if it doesn't exist already. IMHO, if you table T1 have a unique key, you may do this INSERT OR IGNORE T1 VALUES(1, 2, 3); Best regards, Alexandermailto:[EMAIL PROTECTED]
[sqlite] INSERTing a row only if it doesn't EXIST
I want to avoid doing a two step process outside the db... I want to insert a row only if it doesn't exist already. REPLACE INTO seems to almost do the trick, however, seems like it will UPDATE if the row already exists. I want the row to be left alone if it exists. Am trying to figure out if EXISTS could be creatively used to do this SELECT EXISTS (SELECT id FROM t WHERE id = 5) return 1 if 5 exists, and 0 if it doesn't exist. Is it possible to do an INSERT based on this? Or, do I have to use the logic in my application? My brain is not working, so any help on this would be appreciated. -- Puneet Kishor
