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# ST_MMin

Returns M minima of the given geometry or null if there is no M coordinate.

<img src="https://mintcdn.com/wherobots/wLm_IRUSNlHZTHJP/images/sql-functions/ST_MMin/ST_MMin.svg?fit=max&auto=format&n=wLm_IRUSNlHZTHJP&q=85&s=4c3a04faed3f6a9dae9d7d56b0369eae" alt="ST_MMin" width="400" height="160" data-path="images/sql-functions/ST_MMin/ST_MMin.svg" />

## Signatures

```sql theme={"system"}
ST_MMin(geom: Geometry)
```

## Parameters

<ParamField body="geom" type="Geometry" required>
  The input geometry.
</ParamField>

## Return type

<ResponseField type="Double">
  A numeric value.
</ResponseField>

## Example

```sql theme={"system"}
SELECT ST_MMin(
        ST_GeomFromWKT('LINESTRING ZM(1 1 1 1, 2 2 2 2, 3 3 3 3, -1 -1 -1 -1)')
)
```

```
-1.0
```