Jean-Christophe Deschamps wrote: >> Andrea Galeazzi wrote: >>> I've got a table T made up of only two fields: INT id (PRIMARY KEY) and >>> INT length. >>> I need a statement in order to yield 0 when the key doesn't exist. >> >> Well, "select 0;" fits your spec (you never said what should be >> returned when the key does exist). I would hazard a guess that you >> meant something like this: >> >> select coalesce((select length from T where id=?), 0); > > Sorry to ask but isn't the following exactly the same, but even easier > to read? > > select exists(select rowid from T where id=?);
Yours returns 1 or 0. Mine returns length if found, otherwise 0. Igor Tandetnik _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
