## Syntax
```mermaid
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'themeVariables': {
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flowchart LR
Start((START)) --> ATAN[ATAN]:::quoted
ATAN --> End((END))
```
## Purpose
The `ATAN` SQL function returns the angle of the provided tangent. See also [[TAN]] and [[ATAN2]].
Parameters:
- Input: the tangent to get the angle of.
Returns: A number which represents the angle of the provided tangent.
## Examples
`ATAN` retrieves the angle of the tangent 0:
```sql
select atan(0)
--------
0
```