Introduction to Views

In MySQL, views are virtual tables that allow you to create a result set based on the output of a SQL query. Views are not physical tables; instead, they are saved queries that can simplify complex queries, improve security, and make data retrieval more efficient.

Creating a View

To create a view in MySQL, you use the

CREATE VIEW

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

In this syntax:

• view_name

  is the name of the view you want to create.

• column1, column2, ...

  are the columns you want to include in the view.

• table_name

  is the name of the table you're querying.

• condition

  is an optional condition to filter the data.
  

Using a View

Once you've created a view, you can use it just like a regular table in your queries. For example:

            SELECT * FROM view_name;
        

Example: Creating and Using a View

Let's say you have a database with a "products" table, and you want to create a view that includes only products with a price less than $50. You can do it like this:

            CREATE VIEW affordable_products AS
            SELECT product_name, price
            FROM products
            WHERE price < 50;
        

Now, you can use the "affordable_products" view in your queries to retrieve the names and prices of products that meet the condition.

Conclusion

MySQL views are a powerful tool for simplifying complex queries and enhancing data security. You've learned how to create views using the

CREATE VIEW