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

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Signatures

ST_ZMin(geom: Geometry)

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Parameters

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geom
Geometry
required
The input geometry.

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Return type

A numeric value.

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Example

SELECT ST_ZMin(ST_GeomFromText('LINESTRING(1 3 4, 5 6 7)'))

4.0