ACID is a set of properties that you will need to apply when you try to modify the Database. ACID is an acronym and its meaning is as follow: Atomicity: In a transaction involving two or more discrete pieces of information, either all of the pieces are committed or none are. Consistency: A transaction either creates a new and valid state of data, or, if any failure occurs, returns all data to its state before the transaction was started. Isolation: A transaction in process and not yet committed must remain isolated from any other transaction. Durability: Committed data is saved by the system such that, even in the event of a failure and system restart, the data is available in its correct state.