Prevent concurrency issues

Question

Are these good recommendations to developers to avoid concurrency?
1) WITH (NOLOCK) or WITH (READUNCOMMITED) in select statements?
2) BEGIN TRAN in updates / inserts / deletes statements
Any suggestions is greatly appreciated.

Answer 1

Will enabling Committed Snapshot Isolation in the database help in OLTP? I was reading
http://blogs.technet.com/b/sql_server_isv/archive/2010/12/21/using-read-committed-snapshot-isolation-mini-lab.aspx
Ami,
Its difficult to say what can be best Isolation level for your environment as we dont know about workload and queries. Read committed snapshot has advantages and disadvantages as well you should read below link before implementing. I would suggest you to
do a through testing before going with Snapshot isolation level.
If you are not facing heavy blocking and application is going file I would like you to continue with default read committed isolation level. If you are in idea that Optimistic isolation level is always good then you are wrong please read following resource
and various sections especially cost of row versioning based Isolation level
http://technet.microsoft.com/en-us/library/ms188277%28v=sql.105%29.aspx
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