查询中的错误以获得余额

Question

我有一个现金表与字段：doc_num，旁白，日期，债权人，债务人 现在我想显示总额（债权人债务人）作为每行rows.also显示前余额 像这样的：

-------------------------------------------------------------------------------------- 
doc_num-------date----------narration------------credit-------debtor---balance 
-------------------------------------------------------------------------------------- 
         previous balance         2000  
1  2014/06/10  remit    5000   0    5000 
2  2014/06/12  bar     0   2000   3000 
3  2014/06/15  remit    1000   0    4000 

这是我的查询：

SELECT ''     AS docnum, 
     ''     AS c_date, 
     'previous balance' AS narration, 
     " "     AS creditor, 
     " "     AS debtor, 
     Sum(creditor-debtor), 
     "c_date< ' " & 2014/06/10 & "'" AS Balance 
FROM Cash 
UNION 
SELECT doc_num, 
     c_date, 
     narration, 
     creditor, 
     debtor, 
     Sum(creditor-debtor), 
     "doc_num<=" & doc_num AS Balance 
FROM Cash 
WHERE (((Cash.c_date) Between ("2014/06/10") And ("2014/06/15"))) 
ORDER BY docnum; 

我面临过这样的错误： 试图执行查询该剂量不包括指定表达式“doc_num”作为骨料 我用的一部分这个查询在访问（mdb） 什么是正确的查询？ 谢谢

Answer 1

也许这个：''和'“让我有点失望。

SELECT ''     AS docnum, 
     ''     AS c_date, 
     'previous balance' AS narration, 
     " "     AS creditor, 
     " "     AS debtor, 
     Sum(creditor-debtor), 
     "c_date< ' " & 2014/06/10 & "'" AS Balance 
FROM Cash 
Group by '','','previous balance', " ", " ", "c_date< ' " & 2014/06/10 & "'" 
UNION 
SELECT doc_num, 
     c_date, 
     narration, 
     creditor, 
     debtor, 
     Sum(creditor-debtor), 
     "doc_num<=" & doc_num AS Balance 
FROM Cash 
WHERE (((Cash.c_date) Between ("2014/06/10") And ("2014/06/15"))) 
GROUP BY doc_num, 
     c_date, 
     narration, 
     creditor, 
     debtor, 
     "doc_num<=" & doc_num 
ORDER BY docnum;