SQL implementation differences for the ST_Geometry type

There is little difference between the implementation of spatial SQL (ST_Geometry) implementation for Informix, DB2, Oracle, PostgreSQL, and SQLite. Esri (and IBM, in the case of Informix and DB2) worked to ensure that the standards dictated by the Open Geospatial Consortium (OGC) were applied to the fullest extent possible.

There are, however, two exceptions, neither of which actually breach the OGC standards, but are minor implementation differences of the database management systems.

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6/19/2015