atan2 function

Returns the angle in radians between the positive x-axis of a plane and the point specified by the coordinates (exprX, exprY).

Syntax 

atan2(exprY, exprX)

Arguments

  • exprY: An expression that evaluates to a numeric.

  • exprX: An expression that evaluates to a numeric.

Returns

A DOUBLE.

Examples 

> SELECT atan2(0, 0);
 0.0