How do MySQL views work?

Question

When I create a view I am basically making a new table that will automatically be transacted upon when data in one of the tables it joins changes; is that correct?

A

Answer 1

The difference is :

for view you can only have subqueries in the where - part, not in the from - part so a

CREATE VIEW v AS SELECT * FROM foo WHERE id IN (SELECT id FROM bar) 

would work - but at the same time you get a read-only view ... A simple view on a single table would allow to update "through" the view to the underlying table