Part 2: The 32-Bit/64-Bit Drivers : The SQL Server Legacy Wire Protocol Driver : Isolation and Lock Levels Supported

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:
Using The Snapshot Isolation Level

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