Amazon Redshift will no longer support the use of Python UDFs after June 30, 2026. We will start enforcing it in phases. For more information on the details of Python end of life and migration options, see the [ blog post ](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/) that was published on June 30, 2025. 

# ST\_Azimuth
<a name="ST_Azimuth-function"></a>

ST\_Azimuth returns the north-based Cartesian azimuth using the 2D projections of the two input points. 

## Syntax
<a name="ST_Azimuth-function-syntax"></a>

```
ST_Azimuth(point1, point2)
```

## Arguments
<a name="ST_Azimuth-function-arguments"></a>

 *point1*   
A `POINT` value of data type `GEOMETRY`. The spatial reference system identifier (SRID) of *point1* must match the SRID of *point2*. 

 *point2*   
A `POINT` value of data type `GEOMETRY`. The SRID of *point2* must match the SRID of *point1*. 

## Return type
<a name="ST_Azimuth-function-return"></a>

A number that is an angle in radians of `DOUBLE PRECISION` data type. Values range from 0 (inclusive) to 2 pi (exclusive). 

If *point1* or *point2* is the empty point, then an error is returned. 

If either *point1* or *point2* is null, then null is returned. 

If *point1* and *point2* are equal, then null is returned. 

If *point1* or *point2* is not a point, then an error is returned. 

If *point1* and *point2* don't have the value for the spatial reference system identifier (SRID), then an error is returned. 

## Examples
<a name="ST_Azimuth-function-examples"></a>

The following SQL returns the azimuth of the input points. 

```
SELECT ST_Azimuth(ST_Point(1,2), ST_Point(5,6));
```

```
st_azimuth
-------------------
 0.7853981633974483
```