CREATE TABLE tblSales (MonthNumber int,MonthName varchar(10) PRIMARY KEY,ProductA INT,ProductB INT,ProductC INT) INSERT INTO tblSales Select 1,'Jan',5800,5900,5400 union allSelect 2,'Feb',5750,5950,5500 union allSelect 3,'Mar',6200,5700,7100 union allSelect 4,'Apr',6300,5900,5400 union allSelect 5,'May',5350,5650,5500 SELECT A.*,X.AvgSales FROM tblSales A inner join(Select MonthName,Avg(Sales) AvgSales from(select MonthName,'A' Product,ProductA Sales FROM tblSalesunion allselect MonthName,'B' Product,ProductB Sales FROM tblSalesunion allselect MonthName,'C' Product,ProductC Sales FROM tblSales) A group by MonthName)Xon a.MonthName=x.MonthName order by a.monthnumber
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