What Is Dirty Read and Phantom Read?
Phantom Reads: Occurs When, During a Transaction, New Rows Are Added (Or Deleted) by Another Transaction to the Records Being Read. Dirty Reads: Data Is...
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Hereof, what is dirty read non repeatable read and phantom read?
Dirty reads: read UNCOMMITED data from another transaction. Non-repeatable reads: read COMMITTED data from an UPDATE query from another transaction. Phantom reads: read COMMITTED data from an INSERT or DELETE query from another transaction.
Secondly, what is dirty read in SQL Server? Understanding Dirty Read Problem with SQL Server. A dirty read occurs when one transaction is permitted to read data that is being modified by another transaction which is running concurrently but which has not yet committed itself.
Subsequently, question is, what is Phantom read?
A phantom read occurs when, in the course of a transaction, new rows are added or removed by another transaction to the records being read. The phantom reads anomaly is a special case of Non-repeatable reads when Transaction 1 repeats a ranged SELECT
How do I stop phantom read?
PHANTOM reads can be prevented by using SERIALIZABLE isolation level, the highest level. This level acquires RANGE locks thus preventing READ, Modification and INSERT operation on other transaction until the first transaction gets completed.
