Snapshot isolation

Snapshot Isolation is a way of ensuring that when a computer is trying to read and use data, it only uses the most up-to-date data. Basically, it is a way of making sure that data is not changed or messed up by someone else while the computer is using it. Think of it like a snapshot of a moment in time. When the computer looks at that moment in time, it can be sure that no one else changed the data.