ATAN function [Numeric]

Returns the arc-tangent, in radians, of a number.

Syntax
ATAN( numeric-expression )
Remarks

The ATAN and TAN functions are inverse operations.

Parameters
  • numeric-expression   The tangent of the angle.

Returns

DOUBLE

Remarks

This function converts its argument to DOUBLE, and performs the computation in double-precision floating point.

See also
Standards and compatibility
  • SQL/2003   Vendor extension.

Example

The following statement returns the arc-tangent value for 0.52.

SELECT ATAN( 0.52 );