The Power of Repeatable Reads

A lot of databases use versioning for this. They version each row. So that means anything and that's how Postgres works to a certain extent. That is powerful. And the final one is essentially serializable, which is basically, you almost like using locks, which I talked about many times in there.That means if someone tries to edit this role, they gonna fail because you have exclusivity on this role, table. Nobody touches this thing. Exhues of lock or shared lock,. If you wanna read, if you exclude lock, if you wanna write to it.