asp中如何累计数据？
我想在库里取出4个单位，把这四个单位的运输车辆累计起来变成月累计字段，如下代码是我写的，可是计算车来的却是每个单位的累计，我想要的是四个单位一起的。
帮忙看看如下代码：
<%rs_jhsz.movefirst%> <%for i=1 to num_jhsz%>

<% '计算月累计运行车辆
set rs1_jhsylj = server.createobject( "ADODB.Recordset ")
sql1_jhsylj= "select sum(yield) as jhsylj1 from data_jhsz where unit= ' "&rs_jhsz( "unit ")& " ' and year(sc_day)= ' "&year(session( "sc_date "))& " 'and month(sc_day)= ' "&month(session( "sc_date "))& " 'and day(sc_day) <= ' "&day(session( "sc_date "))& " ' "
rs1_jhsylj.open sql1_jhsylj,conn,3,2
%>

<td align= "middle " width= "18% " height= "29 "> <font size= "2 "> <%=rs1_jhsylj.fields( "jhsylj1 ")%> </font> </td>
<%rs_jhsz.movenext
next%>



[解决办法]
把数据库表结构给出来吧
[解决办法]
select sum(yield) as xx from data_jhsz


[解决办法]
因为单位唯一