MOD

Returns the remainder of an INTEGER expression divided by a second INTEGER expression.

SQL syntax

MOD(Expression1, Expression2)

Parameters

MOD has the following parameters:

Parameter Description

Expression1

An INTEGER expression.

Expression2

An INTEGER expression.

Description

  • MOD returns the remainder of Expression1 divided by Expression2.

  • If Expression2 is 0, then MOD returns Expression1.

  • If either Expression1 or Expression2 is NULL, MOD returns NULL.

  • MOD is treated as a binary arithmetic operation, so the return type is determined according to the rules specified in the "Data Types" chapter.

  • The MOD function behaves differently from the classic mathematical modulus function when one of the operands is negative. The following table illustrates this difference:

    M N Classic Modulus MOD(M,N)

    11

    3

    2

    2

    11

    -3

    -1

    2

    -11

    3

    1

    -2

    -11

    -3

    -2

    -2

The following example tests whether the value of the expression m is divisible by the value of expression n. 

SELECT m, n FROM test WHERE MOD(m, n) = 0;