ST_Difference
Signature
Parameters
ColumnOrName
required
Geometry column to use in the calculation.
ColumnOrName
required
Geometry column to subtract from geometry column a.
Returns
Column
Part of geometry a that is not in b as a geometry column.
Overlay Functions
ST_Difference (Python)
Calculate the difference of two geometry columns.
Calculate the difference of two geometry columns. This difference
is not symmetric. It only returns the part of geometry a that is not
in b.
SQL reference: