| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | rea_studycase_cat_studycase | ref | PRIMARY, IDX_D8667071174FC76D, IDX_D8667071376D5F00 | PRIMARY | 4 | const | 1 | Using index |
| 1 | SIMPLE | t0 | eq_ref | PRIMARY | PRIMARY | 4 | c1references.rea_studycase_cat_studycase.cat_studycase_id | 1 |