> ## Documentation Index
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> Use this file to discover all available pages before exploring further.
# ST_Within
Return true if A is fully contained by B
## Signatures
```sql theme={"system"}
ST_Within (A: Geometry, B: Geometry)
```
## Parameters
The input geometry.
The second geometry.
## Return type
Returns `true` or `false`.
## Example
```sql theme={"system"}
SELECT ST_Within(ST_GeomFromWKT('POLYGON((0 0,3 0,3 3,0 3,0 0))'), ST_GeomFromWKT('POLYGON((1 1,2 1,2 2,1 2,1 1))'))
```
```
false
```