Use "union" ??? -----Original Message----- From: pgsql-general-owner@xxxxxxxxxxxxxx [mailto:pgsql-general-owner@xxxxxxxxxxxxxx] On Behalf Of Stefan Schwarzer Sent: Wednesday, October 24, 2007 9:09 AM To: pgsql-general@xxxxxxxxxxxxxx Subject: "Concatenate" two queries - how? Hi there, I have two queries, which I would like to bring together to form one result. The first query is a simple SELECT on a table of national statistics. SELECT COALESCE(c.name, ''''), year_start AS year, value FROM fish_catch AS d LEFT JOIN countries AS c ON c.id = id_country WHERE (year_start = 1995 OR year_start = 2000 ) AND (name = 'Afghanistan' OR name = 'Albania' ) The second query is an aggregation-on-the-fly of these national statistics to its regions. The result is for example not "Germany, France, Algeria, ...", but "Europe, Africa, ..." SELECT COALESCE(r.name, ''''), year_start AS year, SUM(value) AS value FROM life_expect AS d LEFT JOIN countries_view AS c ON c.id = id_country RIGHT JOIN regions AS r ON r.id = c.reg_id WHERE (year_start = 1995 OR year_start = 2000 ) AND (r.name = 'Europe') GROUP BY r.name, year_start Now, I want to enable queries which display national as well as regional values. I could probably work with independent queries, but I think it would be "cleaner" and more efficient to get everything into a single query. Can someone give me a hint how this would work? Thanks a lot! Stef ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org/
