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ATAN

Calculates the arc tangent of the real number returned by the specified expression.

Syntax

ATAN(<expression>)

Parameters

Parameter Description Supported input types
<expression> The expression that the ATAN function is applied to Any expression that evaluates to a real number

Return Type

DOUBLE PRECISION

Example

The following example returns the arc tangent of the specified literal value 90:

SELECT
    ATAN(90);

Returns: 1.5596856728972892