Can you update data through a view?
Yes, you can update data through a view, but only if it's simple - meaning it's based on a single table and has no complex operations like JOIN, GROUP BY, DISTINCT, SUM(), and the like.
Example: it works
sql
CREATE VIEW user_info AS
SELECT id, name, email
FROM users;
UPDATE user_info
SET email = 'new@mail.com'
WHERE id = 3;The change goes through, the record in the users table gets updated.
But if a view combines several tables (JOIN) or uses computations, the database can't tell exactly where to update the data - and the operation fails.
So: simple VIEWs can be updated, complex ones can only be read.
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