mysql向上取整函數ceil()/ceiling()

mysql> SELECT CEILING(3.46);
+---------------------------------------------------------+
| CEILING(3.46) |
+---------------------------------------------------------+
| 4 |
+---------------------------------------------------------+
1 row in set (0.00 sec)

mysql> SELECT CEIL(-6.43);
+---------------------------------------------------------+
| CEIL(-6.43) |
+---------------------------------------------------------+
| -6 |
+---------------------------------------------------------+
1 row in set (0.00 sec)