CREATE VIEW PostgreSQL User's GuidePrevNextCREATE VIEWName CREATE VIEW — Constructs a virtual table CREATE VIEW view AS SELECT query Inputs view The name of a view to be created. queryAn SQL query which will provide the columns and rows of the view. Refer to the SELECT statement for more information about valid arguments. Outputs CREATE The message returned if the view is successfully created. WARN amcreate: "view" relation already exists This error occurs if the view specified already exists in the database. NOTICE create: attribute named "column" has an unknown type The view will be created having a column with an unknown type if you do not specify it. For example, the following command gives an error: CREATE VIEW vista AS SELECT 'Hello World' whereas this command does not: CREATE VIEW vista AS SELECT 'Hello World'::text Description CREATE VIEW will define a view of a table. This view is not physically materialized. Specifically, a query rewrite retrieve rule is automatically generated to support retrieve operations on views. Notes Use the DROP VIEW statement to drop views. Bugs Currently, views are read only. Usage Create a view consisting of all Comedy films: CREATE VIEW kinds AS SELECT * FROM films WHERE kind = 'Comedy'; SELECT * FROM kinds; code |title |did| date_prod|kind |len -----+-------------------------+---+----------+----------+------ UA502|Bananas |105|1971-07-13|Comedy | 01:22 C_701|There's a Girl in my Soup|107|1970-06-11|Comedy | 01:36 Compatibility SQL92 SQL92 specifies some additional capabilities for the CREATE VIEW statement: CREATE VIEW view [ column [, ...] ] AS SELECT expression [AS colname] [, ...] FROM table [ WHERE condition ] [ WITH [ CASCADE | LOCAL ] CHECK OPTION ] CHECK OPTION This option is to do with updatable views. All INSERTs and UPDATEs on the view will be checked to ensure data satisfy the view-defining condition. If they do not, the update will be rejected. LOCAL Check for integrity on this view. CASCADE Check for integrity on this view and on any dependent view. CASCADE is assumed if neither CASCADE nor LOCAL is specified. PrevHomeNextCREATE USERUpDECLARE