How to manage a MySQL view after it has been created?

Once a MySQL view has been created, it can be managed using the following methods:

1. Update view: You can use the CREATE OR REPLACE VIEW statement to update the definition of a view. For example, if you want to change the query conditions or column names of a view, you can use this statement to update it.
2. To delete a view, you can use the DROP VIEW statement to remove one or more views. For example, DROP VIEW view_name will delete the view named view_name.
3. Viewing views: You can use the SHOW CREATE VIEW statement to check the definition of a view. For example, SHOW CREATE VIEW view_name will display the creation statement of the view named view_name.
4. Viewing data in a view: You can query the data in a view using a SELECT statement just like you would with a regular table.

It is important to note that views are virtual tables and their data is obtained from base tables. Therefore, changes made to the data of a view actually affect the base table. If changes to the data of a view are needed, the data of the base table should be modified directly.

Furthermore, the ALTER VIEW statement can be used to modify the properties of a view, such as changing the view’s name or owner.