[postgis-users] Extent on multiple tables

Lars Rößiger lars.roessiger at d33.net
Fri Oct 21 03:00:17 PDT 2005


is there a possibility to use the Extent-function on multiple tables in
one query? My map layers (built-up areas, waterlines, etc.) are in
separate tables, but to build the map I need to know the cumulative
Extent of all layers. I tried INNER JOIN and even subselects within the
Extent-function -- without success.

Thank you,

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