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SQL Anywhere 11.0.0 » SQL Anywhere Server - SQL Reference » Using SQL » SQL functions » Alphabetical list of functions


ATAN2 function [Numeric]

Returns the arc-tangent, in radians, of the ratio of two numbers.

{ ATN2 | ATAN2 }( numeric-expression-1, numeric-expression-2 )
  • numeric-expression-1   The numerator in the ratio whose arc-tangent is calculated.

  • numeric-expression-2   The denominator in the ratio whose arc-tangent is calculated.


This function converts its arguments to DOUBLE, performs the computation in double-precision floating point, and returns a DOUBLE as the result.

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


The following statement returns the arc-tangent value for the ratio 0.52 to 0.60.

SELECT ATAN2( 0.52, 0.60 );