Looks like you don't have index on `lad_id` field in second table. So when you do the first query, mysql first does a full scan of 2nd table, then does eqref lookup for 1st table, which is rather fast operation. But when you do the left join, it scans first table and for each value of id does a scan of second table, which is performance killer.
-- Alexey Polyakov -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
