merging two SELECT queries

Question

I am either getting old or the queries that I need to write are getting more and more complicated. The following query will get all the tasks associated with the us

Answer 1

I'd probably use a UNION.

SELECT `date`
   FROM `tasks` WHERE `user_id`=1
UNION
SELECT `t1`.`date`
   FROM `tasks` `t1`
   INNER JOIN `urls` `u1` ON `u1`.`id` = `t1`.`url_id`
   WHERE `u1`.user_id`=1;