mysql> select * from table1 where minute(order_date)=46;
+----------+------------+-----+---------------------+
| name_new | transactor | pid | order_date |
+----------+------------+-----+---------------------+
| 3hahha | 3xiaohong | 3 | 2019-08-04 20:46:02 |
| 4hahha | 4xiaohong | 4 | 2019-08-04 20:46:05 |
| 3hahha | bob | 5 | 2019-08-04 20:46:08 |
| 3hahha | lee | 6 | 2019-08-04 20:46:12 |
+----------+------------+-----+---------------------+
4 rows in set (0.00 sec)
mysql> select count(*) as num from table1 where minute(order_date)=46;
+-----+
| num |
+-----+
| 4 |
+-----+
1 row in set (0.00 sec)
