Does the order of columns matter in SQL statement - response (2) by mathiroom

Order of the columns doesn't make problem. if you are selecting fileds with aggregate function used in query, you shoud have to do GROUP BY. otherwise non-aggregate problem will occur. Try the below query, it works sel A1-A1NC as A1C, A1,B1  from (sel sum(case when IND=1 then 1 else 0 end) A1 from TN)t,TN sel (sel sum(case when IND=1 then 1 else 0 end) A1 from TN)-A1NC as A1C, B1 from TN