Hi Mahlar Try http://groups.google.co.uk/group/microsoft.public.sqlserver/browse_thread/thread/d537c5669f83cf63/8207c4315bea2613?lnk=st&q=bit+versus+char(1)+for+boolean+in+SQL+server&rnum=2&hl=en#8207c4315bea2613[^] Because it's so obvious then it's hard to find arguments. The origin of this seems to be where a database is based on early technology where bit was either not available or optimised (early MySQL for example). It seems as if te DBA's only arguement is readability. As well as the above you also have no need to index, efficiency, supportable, easier to maintain, more scaleable and .... Good luck - you deserve to win Peter Smith