https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions112.htm

POWER

Syntax

Description of the illustration power.gif

Purpose

POWERreturnsn2raised to then1power. The basen2and the exponentn1can be any numbers,but ifn2is negative,thenn1must be an integer.

This function takes as arguments any numeric datatype or any nonnumeric datatype that can be implicitly converted to a numeric datatype. If any argument isBINARY_FLOATorBINARY_DOUBLE,then the function returnsBINARY_DOUBLE. Otherwise the function returnsNUMBER.

See Also:

Table 2-10,"Implicit Type Conversion Matrix"for more information on implicit conversion

Examples

The following example returns 3 squared:

SELECT POWER(3,2) "Raised" FROM DUAL;

    Raised
----------
         9

https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions088.htm

MOD

Syntax

Description of the illustration mod.gif

Purpose

MODreturns the remainder ofn2divided byn1. Returnsn2ifn1is 0.

This function takes as arguments any numeric datatype or any nonnumeric datatype that can be implicitly converted to a numeric datatype. Oracle determines the argument with the highest numeric precedence,implicitly converts the remaining arguments to that datatype,and returns that datatype.

See Also:

Table 2-10,"Implicit Type Conversion Matrix"for more information on implicit conversion and"Numeric Precedence"for information on numeric precedence

Examples

The following example returns the remainder of 11 divided by 4:

SELECT MOD(11,4) "Modulus" FROM DUAL;

   Modulus
----------
         3

（编辑：李大同）

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