Le 19/09/2012 17:08, Merlin Moncure a écrit :
SELECT * FROM foo LEFT JOIN BAR ON foo.id = bar.id AND bar.col = 'something';
The difference here is that the filtering is now happening at join
time where the left join semantics are playing: always return foo and
return bar rows if and only if the join condition is met.
Ok, as a rule of thumb, should I put in the where clause only the
conditions related to foo and inner joins ? All other (outer) conditions
should then go on their respective 'ON' clauses ?
JC
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