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SQL Server 2008 Concurrency Problems and Isolation(technotes.towardsjob.com)

submitted by nitinkumarbenitinkumarbe(175) 2 years, 8 months ago

Concurrency problems SQL Server transaction isolation solves four major concurrency problems Dirty read occur when a reader reads uncommitted data Unrepeatable read occurs when existing row change within a transaction Lost updates occur when two writers modify the same piece of state Phantoms occur when new rows are added and appear within a transaction Locking strategies Optimistic concurrency

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