ST_DIFFERENCE
Syntax
ST_DIFFERENCE(g1,g2)
Description
Returns a geometry representing the point set difference of the given geometry values.
Example
SET @g1 = POINT(10,10), @g2 = POINT(20,20); SELECT ST_AsText(ST_Difference(@g1, @g2)); +------------------------------------+ | ST_AsText(ST_Difference(@g1, @g2)) | +------------------------------------+ | POINT(10 10) | +------------------------------------+
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