ATAN2

Syntax

ATAN2(X,Y)

Purpose

You can call this function to return the arc tangent of X and Y. It is similar to calculating the arc tangent of Y/X, except that the signs of the two parameters determine the quadrant in which the result resides.

You can write this function as ATAN(X,Y). For more information, see ATAN.

Examples

obclient> SELECT ATAN(PI(),0);
+--------------------+
 ATAN(PI(),0)       
+--------------------+
 1.5707963267948966 
+--------------------+
1 row in set (0.01 sec)