Syntax
ATAN(X)
Purpose
ATAN() returns the arc tangent of X.
Examples
obclient> SELECT ATAN(-10), ATAN(0), ATAN(10), ATAN(-0.5), ATAN(0.5);
+---------------------+---------+--------------------+---------------------+--------------------+
| ATAN(-10) | ATAN(0) | ATAN(10) | ATAN(-0.5) | ATAN(0.5) |
+---------------------+---------+--------------------+---------------------+--------------------+
| -1.4711276743037347 | 0 | 1.4711276743037347 | -0.4636476090008061 | 0.4636476090008061 |
+---------------------+---------+--------------------+---------------------+--------------------+
1 row in set