The isolation represents the WAY of separating the database from the effects of NETWORK accesses, thereby maintaining the consistency. The different levels of isolation are:

● read committed: This level of isolation uses the shared locks and the reads to the database GIVE the constant and consistent VALUES.
● read UNCOMMITTED: No locks implemented. This is the least effective isolation level.
● repeatable read: There are locks over the rows and values but the updates are maintained as a separate phantom row which is the next set of values for the specific record. Values can change within a specific transaction of a SQL function.
● SERIALIZABLE reads: This is the implementation of pure lock mechanism where one specific transaction is not allowed access to specific record before another one completes.

The isolation represents the way of separating the database from the effects of network accesses, thereby maintaining the consistency. The different levels of isolation are:

● read committed: This level of isolation uses the shared locks and the reads to the database give the constant and consistent values.
● read uncommitted: No locks implemented. This is the least effective isolation level.
● repeatable read: There are locks over the rows and values but the updates are maintained as a separate phantom row which is the next set of values for the specific record. Values can change within a specific transaction of a SQL function.
● SERIALIZABLE reads: This is the implementation of pure lock mechanism where one specific transaction is not allowed access to specific record before another one completes.