Scott Frankel <leknarf@xxxxxxxxxxx> wrote: > Is it possible to perform a select in the where clause of a statement? > I have a situation where I've got one arm tied behind my > back: I can only have a single table in the select and from > clauses, but the where clause appears to be freed from that > restriction. > Given a statement as follows: > SELECT foo.foo_id, foo.name > FROM foo, bar > WHERE foo.bar_id = bar.bar_id > AND bar.name = 'martini'; > I'm looking for a way to recast it so that the select and > from clauses refer to a single table and the join > referencing the second table occurs in the where clause. > [...] Something along the lines of: | SELECT foo.foo_id, foo.name FROM foo WHERE foo.bar_id = (SELECT bar.bar_id FROM bar WHERE bar.name = 'martini'); should do the trick. > I've explored the "where exists" clause, but it's not > supported by the application toolkit I'm using. AFAIK, I've > only got access to where ... Dump it. Seriously. There are so many fine things you can do with a full-fledged database - you certainly do not want to be restricted in this regard. Tim -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
