1. NOCOUNT
Normally if you perform query in Query Analyzer, it will return row count information in output. By default this NOCOUNT option is tuning OFF, it is advised to SET NOCOUNT ON to save overhead and increase performance.

2. NOLOCK
This will not lock your table and increase performance.

3. Return Value
If you are querying about single value, to best is just return value to save the overhead and performance.

Posted via web from Ervin Ter’s posterous