| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | PRIMARY | targeting_target_groups | index | PRIMARY | 4 | 1 | 100.00 | Using index | |||
| 2 | UNION | targeting_rules | index | PRIMARY | 4 | 1 | 100.00 | Using index | |||
| UNION RESULT | <union1, 2> | ALL | Using temporary |