SQL FunctionsNumeric FunctionsATANOn this pageATANReturns the arc tangent of x, that is, the value whose tangent is x.SyntaxATAN( <x> )ExamplesSELECT ATAN(-2);┌─────────────────────┐│ atan((- 2)) │├─────────────────────┤│ -1.1071487177940906 │└─────────────────────┘