how to get the date diff on once field in sql server
SELECT t1.OrderNo,DATEDIFF(day,t1.LoadedStartDate,t2.LoadedStartDate) FROM UnnamedTableFromQuestion t1 INNER JOIN UnnamedTableFromQuestion t2 on t1.OrderNo = t2.OrderNo WHERE t1.OpNo = 1 and t2.OpNo = 4 //////////////////////////////////////////////////////////////// select cur.unique_id_field, cur.seq_no, cur.date_created , datediff(second, prv.date_created, cur.date_created) as diff_in_seconds from yourtable as cur join yourtable as prv on cur.seq_no = prv.seq_no + 1;
