Difference between revisions of "Union"

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Revision as of 15:11, 10 July 2012

Make union between different tables to build one single view or request?

List a number of SELECT statements separated by the UNION key word. Be sure that you have the same number of columns in each of the SELECT statements.

CREATE TABLE bbc (name VARCHAR(10), region VARCHAR(10));
INSERT INTO bbc VALUES ('Poland', 'Europe');
INSERT INTO bbc VALUES ('Japan', 'Asia');
SELECT name FROM actor WHERE name LIKE 'Z%'
UNION
SELECT name FROM bbc WHERE name LIKE 'Z%'
SELECT name FROM actor WHERE name LIKE 'Z%'
UNION
SELECT name FROM bbc WHERE name LIKE 'Z%'
SELECT name FROM actor WHERE name LIKE 'Z%'
UNION
SELECT name FROM bbc WHERE name LIKE 'Z%'
SELECT name FROM actor WHERE name LIKE 'Z%'
UNION
SELECT name FROM bbc WHERE name LIKE 'Z%'
UNION will be available from version 4
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