> # Isolation Levels

> This section discusses the isolation levels supported by SequeLink.

> Table B-6 lists the isolation levels supported by each data store, including their default isolation level.

> Table B-6. Isolation Levels
> Database | Isolation Levels | Default
> --- | --- | ---
> DB2 UDB on Linux/UNIX/Windows | Read uncommitted Read committed Repeatable read Serializable | Read committed
> Informix | Read uncommitted Read committed Repeatable read | Read committed
> Microsoft SQL Server | Read uncommitted Read committed Read Committed with Snapshots1 Read Committed with Locks1 Repeatable read Serializable Snapshot1 | Read committed
> Oracle | Read committed Serializable | Read committed
> Sybase | Read uncommitted Read committed Repeatable read Serializable | Read committed

> 1Supported on Microsoft SQL Server only. See "Using Snapshot Isolation Level (Microsoft SQL Server 2005 Only)" for more information.