I have a spatial postgis database named "testdata" having two schema named "afgdata" and "pakdata" with common table names viz. building_a, places, railways, roads, water_a, waterways of different area.



I am not familiar with both Postgis and FME.

I want to merge both schema in to new schema named "mergedata" within same database. Can anybody help me out to do it with FME or direct in PostgreSQL?

Is it possible to merge both schema and output in new database in public schema?


One approach would be to use UNION in PostgreSQL.

For example,

WITH waterways AS (
    SELECT * FROM afg_data.waterways
    SELECT * FROM pak_data.waterways
SELECT * FROM waterways;
  • Thanks Richard, it works. But what for multiple tables?
    – Sachin
    Mar 26 '18 at 8:59
  • The example does have multiple tables. Mar 26 '18 at 9:09
  • Yes in image places, buildings, roads, railways.
    – Sachin
    Mar 26 '18 at 9:11
  • Depending on how many there are and if it's going to be automated, either just write a manual query, or use another query to list the tables in each schema, and use that intermediate result to produce the final query. You might have some issues because your table names are inconsistent (buildings and buildings_a). stackoverflow.com/questions/15644152/… Mar 26 '18 at 20:57
  • I have only following layer : building_a, places, railways, roads, water_a and waterways in both database of different area. Is this possible to merge all layers in a new database or existing database having the same layer?
    – Sachin
    Mar 27 '18 at 5:22

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