ЗАПРОС1 UNION ЗАПРОС2

mysql> select count(pid) from posts where uid_posts=8890 and postacc=1 and postcomacc=1 ;
+------------+
| count(pid) |
+------------+
|          2 |
+------------+


mysql>  select count(comid) from coms join posts on pid_coms=pid where uid_posts!=8890 and uid_coms=8890 and postacc=1 and postcomacc=1;
+--------------+
| count(comid) |
+--------------+
|            2 |
+--------------+

//вот они оба  как-бэ групируются.

mysql> select count(pid) from posts where uid_posts=8890 and postacc=1 and postcomacc=1 union select count(comid) from coms join posts on pid_coms=pid where uid_posts!=8890 and uid_coms=8890 and postacc=1 and postcomacc=1;
+------------+
| count(pid) |
+------------+
|          2 |
+------------+