MySQL Left Outer Join with Count from joined table, Show all records?

You need to move "p. Active = 1" from the WHERE clause into the OUTER JOIN criteria.

You asked about optimizing it, hoping that a index on the "path" column might help. Unfortunately you are searching for a value of path that matches LIKE CONCAT( '%/', r. Region_id, '/%' ), and no index in the world is smart enough to work with that.

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