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# Common Functions
These functions are shared between Postgres and MySQL
* [ST_Area(geometry)](./common/ST_Area.md)
* [ST_AsBinary(geometry)](./common/ST_AsBinary.md)
* [ST_AsText(geometry)](./common/ST_AsText.md)
* [ST_Buffer(geometry, double, [integer])](./common/ST_Buffer.md)
* [ST_Centroid(geometry)](./common/ST_Centroid.md)
* [ST_Contains(geometry A, geometry B)](./common/ST_Contains.md)
* [ST_ConvexHull(geometry)](./common/ST_ConvexHull.md)
* [ST_Crosses(geometry, geometry)](./common/ST_Crosses.md)
* [ST_Difference(geometry A, geometry B)](./common/ST_Difference.md)
* [ST_Dimension(geometry)](./common/ST_Dimension.md)
* [ST_Disjoint(geometry, geometry)](./common/ST_Disjoint.md)
* [ST_Distance(geometry, geometry)](./common/ST_Distance.md)
* [ST_EndPoint(geometry)](./common/ST_EndPoint.md)
* [ST_Envelope(geometry)](./common/ST_Envelope.md)
* [ST_Equals(geometry, geometry)](./common/ST_Equals.md)
* [ST_ExteriorRing(geometry)](./common/ST_ExteriorRing.md)
* [ST_GeoHash()](./common/ST_GeoHash.md)
* [ST_GeomCollFromText()](./common/ST_GeomCollFromText.md)
* [ST_GeometryN(geometry,int)](./common/ST_GeometryN.md)
* [GeometryType(geometry)](./common/GeometryType.md)
* [ST_GeomFromGeoJSON()](./common/ST_GeomFromGeoJSON.md)
* [ST_GeomFromText(text,[<srid>])](./common/ST_GeomFromText.md)
* [ST_GeomFromWKB(bytea,[<srid>])](./common/ST_GeomFromWKB.md)
* [ST_InteriorRingN(geometry,integer)](./common/ST_InteriorRingN.md)
* [ST_Intersection(geometry, geometry)](./common/ST_Intersection.md)
* [ST_Intersects(geometry, geometry)](./common/ST_Intersects.md)
* [ST_IsClosed(geometry)](./common/ST_IsClosed.md)
* [ST_IsEmpty(geometry)](./common/ST_IsEmpty.md)
* [ST_IsSimple(geometry)](./common/ST_IsSimple.md)
* [ST_IsValid()](./common/ST_IsValid.md)
* [ST_Length(geometry)](./common/ST_Length.md)
* [ST_LineFromText(text,[<srid>])](./common/ST_LineFromText.md)
* [ST_LineFromWKB(bytea,[<srid>])](./common/ST_LineFromWKB.md)
* [ST_MakeEnvelope()](./common/ST_MakeEnvelope.md)
* [ST_MLineFromText(text,[<srid>])](./common/ST_MLineFromText.md)
* [ST_MLineFromWKB(bytea,[<srid>])](./common/ST_MLineFromWKB.md)
* [ST_MPointFromText(text,[<srid>])](./common/ST_MPointFromText.md)
* [ST_MPointFromWKB(bytea,[<srid>])](./common/ST_MPointFromWKB.md)
* [ST_MPolyFromText(text,[<srid>])](./common/ST_MPolyFromText.md)
* [ST_MPolyFromWKB(bytea,[<srid>])](./common/ST_MPolyFromWKB.md)
* [ST_NumGeometries(geometry)](./common/ST_NumGeometries.md)
* [ST_NumInteriorRing(geometry)](./common/ST_NumInteriorRing.md)
* [ST_NumPoints(geometry)](./common/ST_NumPoints.md)
* [ST_Overlaps(geometry, geometry)](./common/ST_Overlaps.md)
* [ST_PointFromGeoHash()](./common/ST_PointFromGeoHash.md)
* [ST_PointFromText(text,[<srid>])](./common/ST_PointFromText.md)
* [ST_PointFromWKB(bytea,[<srid>])](./common/ST_PointFromWKB.md)
* [ST_PointN(geometry,integer)](./common/ST_PointN.md)
* [ST_PolyFromText(text,[<srid>])](./common/ST_PolyFromText.md)
* [ST_PolyFromWKB(bytea,[<srid>])](./common/ST_PolyFromWKB.md)
* [ST_SRID(geometry)](./common/ST_SRID.md)
* [ST_StartPoint(geometry)](./common/ST_StartPoint.md)
* [ST_SymDifference(geometry A, geometry B)](./common/ST_SymDifference.md)
* [ST_Touches(geometry, geometry)](./common/ST_Touches.md)
* [ST_Union(geometry set)](./common/ST_Union.md)
* [ST_Union(geometry, geometry)](./common/ST_Union.md)
* [ST_Within(geometry A, geometry B)](./common/ST_Within.md)
* [ST_X(geometry)](./common/ST_X.md)
* [ST_Y(geometry)](./common/ST_Y.md)