Last Updated: 20 June, 2023
In MySQL, a view is a virtual table that is derived from the result of a query. It is not a physical table that stores data itself, but rather a saved query that can be used like a table in subsequent queries.
A view can be considered as a saved query or a predefined query that we can use to simplify complex queries, encapsulate business logic, or provide a simplified view of data to users without exposing the underlying table structure. It allows us to define a specific subset of columns and rows from one or more tables and present it as a new table-like structure.
Some key points about views in MySQL:
To create a view in MySQL, we can use the CREATE VIEW statement.
Here's the basic syntax:
CREATE VIEW view_name AS SELECT column1, column2, ... FROM table_name WHERE condition;
Here's an example to create a view named "customer_view" that includes the columns "customer_id" and "customer_name" from the "customers" table:
CREATE VIEW customer_view AS SELECT customer_id, customer_name FROM customers;
We can then query the view like we would query a regular table:
SELECT * FROM customer_view;
It's important to note that while views provide a convenient way to work with data, they come with some performance considerations. Complex or resource-intensive queries used to define views may impact query execution time when accessing the view. Therefore, it's essential to carefully design and optimize views to ensure efficient performance.
That's all, guys. I hope this MySQL article is helpful for you.
Happy Learning... 😀
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