| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | j3 | const | PRIMARY | PRIMARY | 4 | const | 1 | Using index |
| 1 | SIMPLE | j2 | ref | PRIMARY, idclassification | PRIMARY | 4 | const | 1 | Using index |
| 1 | SIMPLE | j1 | eq_ref | PRIMARY | PRIMARY | 4 | theatreok_dev.j2.idclassification | 1 |