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Drivers for 32-Bit and 64-Bit Platforms : The SQL Server Legacy Wire Protocol Driver : Isolation and Lock Levels Supported
 

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Isolation and Lock Levels Supported

Microsoft SQL Server supports isolation levels 0 (Read Uncommitted), 1 (Read Committed), 2 (Repeatable Read), and 3 (Serializable). Microsoft SQL Server supports row-level and table-level locking. Refer to "Locking and Isolation Levels" in the DataDirect Connect Series for ODBC Reference for details.
Microsoft SQL Server 2005 and higher supports the following additional isolation levels:
*Snapshot
*Read Committed with Snapshots
*Read Committed with Locks (equivalent to Read Committed in previous Microsoft SQL Server versions)
In this section: 
* Using The Snapshot Isolation Level