| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | category | ref | idx.level | idx.level | 4 | const | 1 | Using index condition; Using where; Using filesort |
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | category | ref | idx.level | idx.level | 4 | const | 1 | Using index condition; Using where; Using filesort |