我有桌子 total_count
+----+--------+-------+------+---------+---------+---------+
| id | studid | month | year | acls_id | total_p | total_a |
+----+--------+-------+------+---------+---------+---------+
| 1 | 30 | 08 | 2015 | 12 | 5 | 2 |
| 2 | 35 | 08 | 2015 | 12 | 5 | 2 |
| 3 | 52 | 08 | 2015 | 12 | 5 | 2 |
| 4 | 53 | 08 | 2015 | 12 | 5 | 2 |
| …