mysql> SELECT p2.DbId, p2.happiness, p2.user_DbId, p1.user_DbId, p1.DbId  FROM `pet` AS p1 INNER JOIN pet AS p2 ON ( p1.user_DbId = p2.user_DbId )  having p1.user_DbId = 142;
+------+-----------+-----------+-----------+------+
| DbId | happiness | user_DbId | user_DbId | DbId |
+------+-----------+-----------+-----------+------+
|  482 |         0 |       142 |       142 |  482 |
|  484 |         0 |       142 |       142 |  482 |
|  482 |         0 |       142 |       142 |  484 |
|  484 |         0 |       142 |       142 |  484 |
+------+-----------+-----------+-----------+------+
4 rows in set (0.08 sec)


mysql> SELECT p2.DbId, p2.happiness, p2.user_DbId, p1.user_DbId, p1.DbId  FROM `pet` AS p1 INNER JOIN pet AS p2 ON ( p1.user_DbId = p2.user_DbId )  group by (p1.user_DbId) having p1.user_DbId = 142;
+------+-----------+-----------+-----------+------+
| DbId | happiness | user_DbId | user_DbId | DbId |
+------+-----------+-----------+-----------+------+
|  482 |         0 |       142 |       142 |  482 |
+------+-----------+-----------+-----------+------+