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Return the spatial reference system identifier (SRID) of the geometry.

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Signatures

ST_SRID (A: Geometry)

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Parameters

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A
Geometry
required
The input geometry.

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Return type

An integer value.

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Example

SELECT ST_SRID(ST_SetSRID(ST_GeomFromWKT('POLYGON((1 1, 8 1, 8 8, 1 8, 1 1))'), 3021))

3021