A view is a virtual table in PostgreSQL. A view consists of the result set of a query. Views are used to store commonly-used queries in a database.
How to create a view in PostgreSQL
Views are created using the
CREATE VIEW statement.
The syntax of the
CREATE VIEW statement is as follows:
CREATE VIEW view_name AS SELECT column1, column2, column3 FROM table_name WHERE condition;
view_name is the name of the view to be created. The
column3 are the columns that will be included in the view. The
table_name is the name of the table from which the columns will be selected.
The condition is an optional condition used to filter the rows returned by the query.
Views can be used like any other table in PostgreSQL. For example, you can use views in SELECT, INSERT, UPDATE, and DELETE statements. However, views cannot be used in CREATE TABLE or DROP TABLE statements.
How to delete a view in PostgreSQL
To delete a view, you use the
DROP VIEW statement as follows:
DROP VIEW view_name;
This will drop (delete) the view named
PostgreSQL views are a great way to store commonly-used queries in a database.
Views can be used like any other table in PostgreSQL and can be a useful tool for simplifying database queries.
Another interesting thing is the comparison between views and stored procedures in PostgreSQL