[postgis-users] ESRI union (analysis) in Postgis

[Teresa Fazio]

The solution you propose is valid to get polygons describing 
intersections between two polygons, but I cannot figure out how to 
obtain polygons describing intersections between more than two polygons 
like the central polygon drawn in the shape TEST_Union.
I repeat that the TEST_Union shapefile was simply obtained using the 
"union (analysis)" tool in ESRI ArcGIS.

Any other help?
Thank you.