Which lock hints should I use (T-SQL)?

Question

I want to implement an atomic transaction like the following:

BEGIN TRAN A

SELECT id
FROM Inventory
WITH (???)
WHERE material_id = 25 AND quantity > 10

         


        

Answer 1

You may actually be better off setting the transaction isolation level rather than using a query hint.

The following reference from Books Online provides details of each of the different Isolation levels.

http://msdn.microsoft.com/en-us/library/ms173763.aspx

Here is good article that explains the various types of locking behaviour in SQL Server and provides examples too.

http://www.sqlteam.com/article/introduction-to-locking-in-sql-server