On Thu, Mar 20, 2008 at 5:40 PM, Joe <[EMAIL PROTECTED]> wrote: > Gavin 'Beau' Baumanis wrote: > > > > The copy is inside the same table, so I don't understand why it (the > > required query ) would require any joins. > > > > Ie. I want to copy the contents of a row (but for the id column - of > > course) into a record in the same table. > > I think what you want is something like this: > > Given (col1 being the id or PK): > > col1 | col2 | col3 > ------+------+--------------- > 1 | 123 | first record > 2 | 456 | second record > 3 | 789 | third record > > then > > update t1 set col2 = t1copy.col2, col3 = t1copy.col3 > from t1 as t1copy > where t1.col1 = 1 and t1copy.col1 = 3; > > will result in: > > col1 | col2 | col3 > ------+------+--------------- > 1 | 789 | third record > 2 | 456 | second record > 3 | 789 | third record > > So, it is a join ... of a table with a virtual copy of itself. >
Except that it doesn't work... Did you try to execute that query; I am assuming not. Best regards, -- [EMAIL PROTECTED] [EMAIL PROTECTED] gmail | hotmail | indiatimes | yahoo }.com EnterpriseDB http://www.enterprisedb.com 17° 29' 34.37"N, 78° 30' 59.76"E - Hyderabad * 18° 32' 57.25"N, 73° 56' 25.42"E - Pune 37° 47' 19.72"N, 122° 24' 1.69" W - San Francisco http://gurjeet.frihost.net Mail sent from my BlackLaptop device
