| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | c | const | PRIMARY | PRIMARY | 4 | const | 1 | |
| 1 | SIMPLE | cc | ref | PRIMARY | PRIMARY | 4 | const | 1 | Using index |
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | c | const | PRIMARY | PRIMARY | 4 | const | 1 | |
| 1 | SIMPLE | cc | ref | PRIMARY | PRIMARY | 4 | const | 1 | Using index |