[Solved] Customers who upgraded from which mobile to which in sql server?
[ad_1] WITH recentPhone as ( SELECT Cname, MAX(MobileSI) as recentSI from RECORDS GROUP BY Cname ) SELECT CASE WHEN earlier.Mname is null THEN RECORDS.Cname + ‘ has just got their first mobile, a ‘ + RECORDS.Mname ELSE RECORDS.Cname + ‘ has upgraded from a ‘ + RECORDS.Mname + ‘ to a ‘ + earlier.Mname END … Read more