Data Access :: Selecting Data Without Making Any Lock

I have a scenarios where if I execute select * from tbl it should display the all the records without waiting to release any lock.  For example suppose I have one table called tbl and one session is updating one records and not committed yet and in other session if i execute select * from table I can see all the records, for that records it can show me older version. but my select statement should not wait to commit another session and also it should not show the modified data.