SQL Server ATAN() Function
Definition and Usage
The ATAN() function returns the arc tangent of a number.
Syntax
  ATAN(number)
Parameter Values
| Parameter | Description | 
|---|---|
| number | Required. A numeric value | 
Technical Details
| Works in: | SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse | 
|---|

