http://www.postgresqltutorial.com/postgresql-views/

• Creating PostgreSQL updatable views – gives you examples of creating updatable views that allow you to issue INSERT, UPDATE, and DELETE statement to update data in the base tables through the views.

• Creating updatable views using the WITH CHECK OPTION clause – shows you how to use the WITH CHECK OPTION
  clause to check the view-defining condition when you make a change to the base table through the view. We also discuss the scope of check including LOCAL and CASCADED.

Create Rule的詳細介紹：（9.3版本以上支持）

https://www.postgresql.org/docs/10/static/sql-createrule.html

CREATE [ OR REPLACE ] RULE name AS ON event
 

    TO table_name [ WHERE condition ]
    DO [ ALSO | INSTEAD ] { NOTHING | command | ( command ; command ... ) }

where event can be one of:

    SELECT | INSERT | UPDATE | DELETE

CHECK OPTION信息介紹：（9.3版本以上支持）

https://www.postgresql.org/docs/current/static/sql-createview.html

CREATE [ OR REPLACE ] [ TEMP | TEMPORARY ] [ RECURSIVE ] VIEW name
 
 [ ( column_name [, ...] ) ]
    [ WITH ( view_option_name [= view_option_value] [, ... ] ) ]
    AS query
    [ WITH [ CASCADED | LOCAL ] CHECK OPTION ]

postgraSql支持View可以修改的兩種方法。