with second sql i meant: (select 'Michael Sweeney' BB from acteursenc) if you want one row and you need a dummy table, use "dual".
Michael "Michael Virnstein" <[EMAIL PROTECTED]> schrieb im Newsbeitrag [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > the problem is, that the second sql produces more > than one row. To be exactly the amount of > select count(*) from acteursenc rows, with > 'Michael Sweeney' as value in BB. Perhaps you > have a unique key on nomacteur?! > > I could help further, if i know what you want to do > with your query. > if nuacteur is a pk, use a sequence!!!!! > if two users send this query almost at the same time, > you'll get two times the same pk. > That's because of oracles locking mechanism: > Read does not block read. > read does not block write. > write does not block read. > write blocks write on the same column. > if someone inserts a row with your statement, and hasn't commited his > transaction, > and someone else inserts a row with your statment before he has commited, > then the two will get the same results for max(id)+1. A sequence will never > give the > same result and is easy to use. and for your query, wouldn' this be easier: > insert into acteursenc > (nuacteur, nomacteur) > values > (S_ACTEURSENC.NEXTVAL, 'Michael Sweeney') > > please explain what you want to do. > > Michael > > "Michael Sweeney" <[EMAIL PROTECTED]> schrieb im Newsbeitrag > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > My following query : > > > > insert into acteursenc (nuacteur,nomacteur) > > (select AA, BB from > > (select max(nuacteur)+1 AA from acteursenc), > > (select 'Michael Sweeney' BB from acteursenc))" > > > > produces an ORA-00001: unique constraint error. > > > > The primary key is nuacteur, but by setting AA to max(nuacteur)+1 I should > > be getting a new key that is unique, however it does not seem that way. > > > > What am I doing wrong here? > > > > > > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
