Oracle® Database SQL Reference 10g Release 2 (10.2) Part Number B14200-01 |
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Syntax
Purpose
ATAN2
returns the arc tangent of n1
and n2
. The argument n1
can be in an unbounded range and returns a value in the range of -pi to pi, depending on the signs of n1
and n2
, expressed in radians. ATAN2
(n1,n2
) is the same as ATAN2
(n1/n2
).
This function takes as arguments any numeric datatype or any nonnumeric datatype that can be implicitly converted to a numeric datatype. If any argument is BINARY_FLOAT
or BINARY_DOUBLE
, then the function returns BINARY_DOUBLE
. Otherwise the function returns NUMBER
.
Examples
The following example returns the arc tangent of .3 and .2:
SELECT ATAN2(.3, .2) "Arc_Tangent2" FROM DUAL; Arc_Tangent2 ------------ .982793723