What is a view in Postgres?

What is a view in Postgres?

A view is a database object that is of a stored query. A view can be accessed as a virtual table in PostgreSQL. In other words, a PostgreSQL view is a logical table that represents data of one or more underlying tables through a SELECT statement.

How do views work Postgres?

A view is a named query that provides another way to present data in the database tables. A view is defined based on one or more tables which are known as base tables. When you create a view, you basically create a query and assign a name to the query.

How do I create a PostgreSQL view in Pgadmin 4?

Use the fields in the General tab to identify a view:

1. Use the Name field to add a descriptive name for the view.
2. Use the drop-down listbox next to Owner to select the role that will own the view.
3. If applicable, select the name of the schema in which the view will reside from the drop-down listbox in the Schema field.

How to create view from query in PostgreSQL?

Let’s say you want to create SQL view from query that calculates total sales per product. Here’s the SQL query to create PostgreSQL view. You can also create view in PostgreSQL from multiple tables using the same approach. Just replace the SELECT query in CREATE VIEW statement to fetch data from multiple tables.

How to create a virtual table in PostgreSQL?

Here is an example of how to use the CREATE VIEW statement to create a view in PostgreSQL: This CREATE VIEW example would create a virtual table based on the result set of the SELECT statement. You can now query the PostgreSQL VIEW as follows:

Is the view a physical table in PostgreSQL?

In PostgreSQL, a VIEW is not a physical table, but rather, it is in essence a virtual table created by a query joining one or more tables. Optional. If you do not specify this clause and the VIEW already exists, the CREATE VIEW statement will return an error.

How to update the name of a view in PostgreSQL?

The name of the view that you wish to update. Here is an example of how you would use the CREATE OR REPLACE VIEW statement in PostgreSQL: This CREATE OR REPLACE VIEW example would update the definition of the VIEW called current_inventory without dropping it.