| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | u1_ | const | PRIMARY | PRIMARY | 4 | const | 1 | 100.00 | Using index; Using temporary; Using filesort | |
| 1 | SIMPLE | u2_ | ALL | 1 | 100.00 | Using where | |||||
| 1 | SIMPLE | u0_ | eq_ref | PRIMARY | PRIMARY | 4 | tickets_uvdesk.u2_.category_id | 1 | 100.00 | Using where |