Views

In SQL, a view is a virtual table that is based on the result of a SELECT query.

It does not store the data itself but provides a way to represent the result of a query as if it were a table.

Views are useful for simplifying complex queries, providing a layer of abstraction, and securing sensitive data.

Views Syntax:

CREATE VIEW view_name AS
SELECT column1, column2
FROM table_name
WHERE condition;

  • view_name: The name of the view you want to create.

  • column1, column2: The columns you want to include in the view.

  • table_name: The name of the table or tables from which you are selecting data.

  • condition: Optional. It specifies any conditions to filter the data.

View Example:

CREATE VIEW products_view AS
SELECT product_id, product_name, price
FROM products
WHERE category = "HEALTH_CARE";

After creating a view, we can query it as if it were a table:

SELECT * FROM products_view;

Note: we can also join views with other tables or views, making it a powerful tool for simplifying complex queries.

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