请问下面的语句太长,换行时用什么符号实现上下文连接rs1.Open "select acode.aname,(select sum(balance.rmbbalance) from balance where acode=acode.acode and month=12 and year=(" & Val(Text1.Text) & "-1)) as 年初余额,sum(case month when " & Val(Text2.Text) & " then balance.rmbdebit else 0 end ) as 借方发生额,(select sum(balance.rmbdebit ) from balance where acode=acode.acode and month<=" & Val(Text2.Text) & " and year=" & Val(Text1.Text) & ") as 借方累计发生额,sum(case month when " & Val(Text2.Text) & " then balance.rmbcredit else 0 end ) as 贷方发生额, (select sum(balance.rmbcredit ) from balance where acode=acode.acode and month<=" & Val(Text2.Text) & " and year=" & Val(Text1.Text) & ") as 贷方累计发生额,sum(case month when " & Val(Text2.Text) & " then balance.rmbbalance else 0 end ) as 期末余额 from acode inner join balance on acode.acode=balance.acode where (balance.year='" & Trim(Text1.Text) & "')group by acode.acode,acode.aname order by acode.acode", conn1, adOpenDynamic, adLockOptimistic
这样" _"