CREATE VIEW

From SQLZOO
Revision as of 11:38, 17 July 2012 by Connor (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

CREATE VIEW

The table games shows the year and the city hosting the Olympic Games.

games
yrcity
2004Athens
2008Beijing
schema:scott
 DROP TABLE games
 CREATE TABLE games(
  yr INTEGER PRIMARY KEY,
  city VARCHAR(20));
INSERT INTO games VALUES (2000,'Sydney');
INSERT INTO games VALUES (2004,'Athens');
INSERT INTO games VALUES (2008,'Beijing');
INSERT INTO games VALUES (2012,'London');

The CREATE VIEW names a SELECT query. That query may be used as if it were a table in many contexts. In this example the VIEW old_games shows those games before 2006.

CREATE VIEW old_games AS
  SELECT yr,city FROM scott.games
   WHERE yr<2006;
SELECT * FROM old_games;

CREATE VIEW old_games AS

 SELECT yr,city FROM games
  WHERE yr<2006;

SELECT * FROM old_games; </source>

See also

Personal tools
Namespaces

Variants
Actions
Reference
Toolbox
Google AdSense