ASA SQL Reference
SQL Functions
Alphabetical list of functions
Returns the arc-tangent, in radians, of a number.
ATAN ( numeric-expression )
numeric-expression The tangent of the angle.
SQL/92 Vendor extension.
SQL/99 Vendor extension.
Sybase Compatible with Adaptive Server Enterprise.
The following statement returns the value 0.479519.
SELECT ATAN( 0.52 )