Non-Updatable Views in MySQL

Some views in MySQL cannot be updated. These non-updatable views contain elements or operations that prevent modification of underlying data.

1. Characteristics of Non-Updatable Views

• Contain GROUP BY clauses
• Use DISTINCT
• Include aggregate functions like SUM(), AVG(), etc.
• JOIN across multiple tables
• Use UNION
• Include LIMIT or OFFSET
• Subqueries in the SELECT list

Attempting to update or delete data through such views will result in an error.

Checking View Definition : 

You can view the SQL statement used to create a view using the SHOW CREATE VIEW command. This helps understand the query logic behind the view.

Syntax:

SHOW CREATE VIEW view_name;

Example:

SHOW CREATE VIEW active_customers;