Transaction levels in SQL server

The following are the different transaction levels in SQL Server:

The following are the different transaction levels in SQL Server with their syntax to set them:

1. READ COMMITTED
Syntax :
SET TRANSACTION ISOLATION LEVEL READ COMMITTED

2.
READ UNCOMMITTED
Syntax :
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED

3. REPEATABLE READ
Syntax :
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ 

4. SERIALIZABLE
Syntax :
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE