Can you insert data into a view?
Yes, sometimes, but not always.
You can insert data into a view (INSERT, UPDATE, DELETE) only if it's based on a single table and doesn't contain complex constructs - such as JOIN, GROUP BY, DISTINCT, SUM(), and the like.
Example: it works
sql
CREATE VIEW simple_users AS
SELECT id, name, email
FROM users;
INSERT INTO simple_users (id, name, email)
VALUES (5, 'Ivan', 'ivan@example.com');But if a view uses JOIN or aggregates, you can't insert data - the database can't tell which table to write to.
So simple views can be modified, while complex ones can only be read.
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