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.