[postgis-users] Extent on multiple tables

[Lars Rößiger]

Hello,

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,
Lars