The following is a list of set operation methods available for use with spatial data. An X in the Round-Earth column indicates that the method is also supported on round-Earth spatial reference systems. The SQL/MM column reflects compliance with the SQL/MM standard (ISO/IEC 13249-3: 2006).
| Method | Type | Description | Round-Earth | SQL/MM |
|---|---|---|---|---|
| ST_Difference method | ST_Geometry type |
Returns the geometry value that represents the point set difference of two geometries. |
X | 5.1.20 |
| ST_Intersection method | ST_Geometry type |
Returns the geometry value that represents the point set intersection of two geometries. |
X | 5.1.18 |
| ST_IntersectionAggr method | ST_Geometry type |
Returns the spatial intersection of all of the geometries in a group |
X | Vendor extension |
| ST_SymDifference method | ST_Geometry type |
Returns the geometry value that represents the point set symmetric difference of two geometries. |
X | 5.1.21 |
| ST_Union method | ST_Geometry type |
Returns the geometry value that represents the point set union of two geometries. |
X | 5.1.19 |
| ST_UnionAggr method | ST_Geometry type |
Returns the spatial union of all of the geometries in a group |
X | Vendor extension |
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