LOG10

声明

LOG10(X)

说明

返回以 10 为底的 X 的指数。

示例

SELECT LOG10(1000);
+-------------+
| LOG10(1000) |
+-------------+
|           3 |
+-------------+
1 row in set (0.001 sec)

SELECT LOG10(-1000);
+--------------+
| LOG10(-1000) |
+--------------+
|         NULL |
+--------------+
1 row in set, 1 warning (0.000 sec)