Run30 has 55 wells that belong to it. Temp table #Today returns 55 records. Temp table #SevenDaysAgo returns 53 because 2 wells don't have records on that date. How can I adjust my query to assign a value of 0 for the 2 wells that did not have a record for 7 days ago? Because currently my results produce 53 records because of the missing. I need 55 records to return. select wellname, convert(varchar,date,101) as Date, gasvolume as SevenDaysAgoGas into #SevenDaysAgo from DataDailyHistory where RunCode = 'run30' And date = dateadd(day,datediff(day,7,GETDATE()),0) order by WellName select wellname, convert(varchar,DateTime,101) as Date, GasVolumePDay as TodayGas into #Today from DataHourlySnapshot where runcode = 'run30' order by WellName select y.*, x.SevenDaysAgoGas, (y.TodayGas-x.SevenDaysAgoGas) as Difference from #SevenDaysAgo x left outer join #Today y on y.WellName = x.WellName
