POWER()

函数说明

POWER(X, Y) 返回 X 的 Y 次方指数值。

函数语法

> POWER(X, Y)

参数释义

参数	说明
X	必要参数，任何当前支持的数值数据
Y	必要参数，任何当前支持的数值数据

示例

````sql drop table if exists t1; create table t1(a int,b int); insert into t1 values(5,-2),(10,3),(100,0),(4,3),(6,-3);

mysql> select power(a,b) from t1; +----------------------+ | power(a, b) | +----------------------+ | 0.04 | | 1000 | | 1 | | 64 | | 0.004629629629629629 | +----------------------+ 5 rows in set (0.01 sec)

mysql> select power(a,2) as a1, power(b,2) as b1 from t1 where power(a,2) > power(b,2) order by a1 asc; +-------+------+ | a1 | b1 | +-------+------+ | 16 | 9 | | 25 | 4 | | 36 | 9 | | 100 | 9 | | 10000 | 0 | +-------+------+ 5 rows in set (0.01 sec) ```