Using the Committed Read Isolation Level
Use the Committed Read option to guarantee that every retrieved row is committed in the table at the time that the row is retrieved. This option does not place a lock on the fetched row. Committed Read is the default level of isolation in a database with logging that is not ANSI compliant.
Committed Read is appropriate when each row is processed as an independent unit, without reference to other rows in the same table or in other tables.