Transaction Isolation Level

What is default Isolation level for SQL Server 2008 or Crystal Report?

Many people have same above question about Isolation Level, may we have same question. So here share the brief answers of this question.

Transaction Isolation Level:

In database systems, isolation is a property that defines how/when the changes made by one operation become visible to other concurrent operations.

Default Isolation level for SQL Server 2008 is “Read Committed”

SQL Server 2008 has following transaction isolation level

Read Committed
Read Uncommitted
Repeatable Read
Serializable
Snapshot

Crystal Report Isolation Level

The default isolation level for database reads in Crystal Reports 9.0 is set to Read Committed

Crystal Reports .Net 1.1 Patch –> Problem ID # ADAPT00194820