ParameterTypexdecimal, doubleReturns: decimalExamplequery: SELECT ATAN(0) siyeh/sql-crm-example-data Run query Copy code results: atan 0.00 Related: ABS, ACOS, ASIN, ATAN2, CEILING, COS, COSH, DEGREES, EXP, EXP10, FLOOR, LOG, LOG10, MOD, PI, POW, RADIANS, ROUND, SIGN, SIN, SINH, SQRT, TAN, TANH, TRUNC