Question

我的数据库中有两个查询，它们从不同的表中返回总数，然后运行第三个查询来比较这些总数？

我需要在单个语句中执行此操作，以便我可以在我的asp.net站点上发布。这些查询可以合并吗？

以下是三个查询

qry_control_d_total

SELECT 
  tbl_control_d.processed_date, 
  Sum(tbl_control_d.dc_amt) 
AS 
  SumOfdc_amt, 
  tbl_currency.cur_type
FROM 
  tbl_control_d 
INNER JOIN 
  tbl_currency 
ON 
  tbl_control_d.cur_code = tbl_currency.cur_code
GROUP BY 
  tbl_control_d.processed_date, tbl_currency.cur_type
AS 
  qry_control_d_total;

qry_sap_total

SELECT 
   tbl_sap.doc_date, 
Sum
   (tbl_sap.dc_amt) 
AS 
   SumOfdc_amt, 
   tbl_sap.cur_type
FROM 
   tbl_sap
GROUP BY 
   tbl_sap.doc_date, 
   tbl_sap.cur_type
AS 
   qry_sap_total;

最终查询

SELECT 
   qry_control_d_total.processed_date, 
   qry_control_d_total.cur_type, 
   [qry_control_d_total].[sumofdc_amt]-[qry_control_d_total].[sumofdc_amt] 
AS 
   balance, 
   qry_control_d_total.SumOfdc_amt, 
   qry_sap_total.SumOfdc_amt
FROM 
   qry_control_d_total 
INNER JOIN 
   qry_sap_total 
ON 
   (qry_control_d_total.processed_date = qry_sap_total.doc_date) 
AND 
   (qry_control_d_total.cur_type = qry_sap_total.cur_type);

欢迎任何建议

这是我在我的vb.net页面中使用的子

sub page_load
    lblyear.text = dateTime.Now.ToString("yyyy")
    Dim objconn as new oledbconnection("provider=Microsoft.jet.oledb.4.0;data source=F:\CCMI\asp\db\control.mdb")
    Dim objcmd As Oledbcommand
    Dim objRdr as OledbDatareader
    Dim strCmd as string
    Dim objDA as oleDbDataAdapter
    if not ispostback then
        '****************
        objcmd = new oledbcommand("SELECT...", objconn)
                objconn.open()
                objRdr = objcmd.executereader()
                dgbal_mc_roi.datasource = objrdr
                dgbal_mc_roi.databind()
                objrdr.close()
                objconn.close()
    end if
end sub

Answer 1

您几乎就在那里，您需要将以前的查询用作派生表：

SELECT 
   qry_control_d_total.processed_date, 
   qry_control_d_total.cur_type, 
   qry_control_d_total.[sumofdc_amt]-qry_control_d_total.[sumofdc_amt] 
AS 
   balance, 
   qry_control_d_total.SumOfdc_amt, 
   qry_sap_total.SumOfdc_amt
FROM (  SELECT tbl_control_d.processed_date, Sum(tbl_control_d.dc_amt) AS SumOfdc_amt, tbl_currency.cur_type
        FROM tbl_control_d 
        INNER JOIN tbl_currency 
        ON tbl_control_d.cur_code = tbl_currency.cur_code
        GROUP BY tbl_control_d.processed_date, tbl_currency.cur_type) AS qry_control_d_total 
INNER JOIN (SELECT tbl_sap.doc_date, Sum(tbl_sap.dc_amt) AS SumOfdc_amt, tbl_sap.cur_type
            FROM tbl_sap
            GROUP BY tbl_sap.doc_date, tbl_sap.cur_type) AS qry_sap_total 
ON qry_control_d_total.processed_date = qry_sap_total.doc_date
AND qry_control_d_total.cur_type = qry_sap_total.cur_type

Answer 2

尝试做一件事

如果您在存储过程中执行这些查询，

将第一个查询的结果放入临时表中第二个表的结果变成了另一个临时表

为这两个临时表写一个连接查询！

SQL - 使用第三个查询来比较前两个的结果

2 个答案: