1.power function

Definition:
The Oracle PL/SQL, the POWER function is a built in function which takes two numeric inputs and returns numeric（数字的） result as first argument raised to second argument. The statement "POWER (a,b)" computes as ( a^b ).

Example Syntax:

POWER(x,y)

Here, "x" is the base while "y" is the exponent(指数).

Example usage：

The SQL query below calculates 2nd power of base 10.

select power（10,2） from dual；

Return result is 100.

FUNCTION_POWER

原文：http://www.cnblogs.com/yjhlsbnf/p/7751446.html