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You can put multiple conditions in your LEFT, RIGHT and INNER/OUTER joins if you want.. below a small example that will give you the idea.
SELECT tbl.id, tblo.naam
FROM sometable tbl
LEFT JOIN someothertable tblo ON tblo.id = tbl.id
AND tblo.function = tbl.function
ORDER BY ....
Didn't know this one.. could have saved me a lotta query's in the past :-(
13598 viewed | 5 opinion(s) | del.icio.us | Digg it | Tjarko @ 01/06/05 0:00 cet
it doesnt work !! dont misguide people with such posts!
14 March 2009 16:12 cet
It works in sql server and oracle. Its probably your way of coding or your database.
14 March 2009 16:22 cet
multiple conditions on a join is commonplace...or did i miss something?
20 April 2009 15:16 cet
It does work, as long as you know what your doing.
Joining on multiple columns doesn't work properly (5.0).
Adding extra conditions does.
03 June 2009 15:10 cet
Never tried to join on multiple columns, just with extra condition, but i think also multiple columns should work.
15 October 2009 19:13 cet