am Wed, dem 28.03.2007, um 11:04:29 -0300 mailte Gerardo Herzig folgendes: > Hi dudes, i have the following question > i have 2 tables with the same format, and i want to know if is there a > possibility of using some sort of count(*) for achieving this result: > select a from table1 where (condition) union select a from table2 where > (condition), count(a) group by a > > The idea is having how many times (condition) is true for both tables. > > Im not shure im explaining myself clearly, my english is not the best > (as you can see ;)
You can use a subselect, a simple example: test=# select *, count(1) from (select 1 union select 2 union select 3) foo group by 1; ?column? | count ----------+------- 1 | 1 2 | 1 3 | 1 (3 rows) Andreas -- Andreas Kretschmer Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header) GnuPG-ID: 0x3FFF606C, privat 0x7F4584DA http://wwwkeys.de.pgp.net ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org