What is READ COMMITTED Isolation Level?

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1. What is READ COMMITTED Isolation Level?

A query in the current transaction cannot read data modified by another transaction that has not yet committed, thus preventing dirty reads. However, data can still be modified by other transactions between issuing statements within the current transaction, so nonrepeatable reads and phantom reads are still possible. The isolation level uses shared locking or row versioning to prevent dirty reads, depending on whether theREAD_COMMITTED_SNAPSHOT database option is enabled. Read Committed is the default isolation level for all SQL Server databases.

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Interview Questions

1. What is READ COMMITTED Isolation Level?

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