"select sum(a) (SELECT count(*) as a F rom " & "{" & "装配线条码追溯表" & yearstring & monthstring & "} WHERE " & "[JH]='" & jhhString & "' union all S ELECT count(*) as a F rom " & "{" & "装配线条码追溯表" & yearstringf & monthstringf & "} WHERE " & "[JH]='" & jhhString & "')"