Oracle® Database SQL Language Reference 11g Release 2 (11.2) Part Number E17118-04 |
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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.
This function takes as arguments any numeric data type or any nonnumeric data type that can be implicitly converted to a numeric data type. If any argument is BINARY_FLOAT
or BINARY_DOUBLE
, then the function returns BINARY_DOUBLE
. Otherwise the function returns NUMBER
.
See Also:
ATAN for information on theATAN
function and Table 3-10, "Implicit Type Conversion Matrix" for more information on implicit conversionThe following example returns the arc tangent of .3 and .2:
SELECT ATAN2(.3, .2) "Arc_Tangent2" FROM DUAL; Arc_Tangent2 ------------ .982793723