摘要:

下文講述MySQL常見數(shù)學(xué)函數(shù)的說明，如下所示:

mysql > select round(2.34);

+-------------+

| round(2.34) |

+-------------+

| 2 |

+-------------+

1 row in set (0.00 sec)

mysql > select round(2.34,1);

+---------------+

| round(2.34,1) |

+---------------+

| 2.3 |

+---------------+

1 row in set (0.00 sec)

mysql > select round(2.36,1);

+---------------+

| round(2.36,1) |

+---------------+

| 2.4 |

+---------------+

1 row in set (0.00 sec)

mysql> select ceil(3);

+---------+

| ceil(3) |

+---------+

| 3 |

+---------+

1 row in set (0.00 sec)

mysql> select ceil(3.12);

+------------+

| ceil(3.12) |

+------------+

| 4 |

+------------+

1 row in set (0.00 sec)

mysql> select ceil(3.62);

+------------+

| ceil(3.62) |

+------------+

| 4 |

+------------+

1 row in set (0.00 sec)

mysql > select ceil(3.02);

+------------+

| ceil(3.02) |

+------------+

| 4 |

+------------+

1 row in set (0.00 sec)

mysql > select floor(0.98);

+-------------+

| floor(0.98) |

+-------------+

| 0 |

+-------------+

1 row in set (0.00 sec)

mysql > select floor(1.98);

+-------------+

| floor(1.98) |

+-------------+

| 1 |

+-------------+

1 row in set (0.00 sec)

mysql > select floor(1.28);

+-------------+

| floor(1.28) |

+-------------+

| 1 |

+-------------+

1 row in set (0.00 sec)

mysql > select truncate(1.66,1);

+------------------+

| truncate(1.66,1) |

+------------------+

| 1.6 |

+------------------+

1 row in set (0.00 sec)

mysql > select truncate(1.69,1);

+------------------+

| truncate(1.69,1) |

+------------------+

| 1.6 |

+------------------+

1 row in set (0.00 sec)

mysql > select truncate(1.60,1);

+------------------+

| truncate(1.60,1) |

+------------------+

| 1.6 |

+------------------+

1 row in set (0.00 sec)

mysql > select mod(10,3);

+-----------+

| mod(10,3) |

+-----------+

| 1 |

+-----------+

1 row in set (0.00 sec)

mysql > select mod(7,2);

+----------+

| mod(7,2) |

+----------+

| 1 |

+----------+

1 row in set (0.00 sec)

總結(jié)

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