将日期范围添加到 SQL 查询

Question

我有以下查询，它返回针对特定公司（我们集团中有多家公司）的供应商的采购订单总价值。

我想使用 poheader.orderdate 添加日期范围，但由于我没有编写此查询，而且它比我习惯的要复杂一些，我不确定在哪里添加此子句。

任何建议将不胜感激。

SELECT  vendor.Vendorid AS 'ID', 
         vendor.name AS 'Name', 
        Total 
FROM    vendor LEFT JOIN 
        (
            select  sum (podetail.orderqty * podetail.unitcost) AS Total, 
                    podetail.VendorNum, 
                    podetail.Company 
            from    podetail 
            where   exists  (
                                select  1 
                                from    poHeader 
                                where   poHeader.OrderNum = podetail.OrderNum 
                                and     poHeader.ApprovalStatus = 'A'
                            ) 
            and     exists  (
                                select  1 
                                from    vendor 
                                WHERE   vendor.company = 'MyCompany' 
                                and     vendor.VendorNum = podetail.VendorNum 
                                and     vendor.Company = podetail.Company
                            ) 
            group by    podetail.VendorNum, 
                        podetail.Company
        ) OD    ON  vendor.Vendornum = OD.Vendornum   
                and vendor.Company = OD.Company 
WHERE   vendor.company = 'MyCompany' 
ORDER BY    vendor.name

Answer 1

好的，一旦格式化，它看起来就没有那么可怕了，是吗？

现在您可以看到 where 子句的放置位置了吗？

类似

SELECT  vendor.Vendorid AS 'ID', 
        vendor.name AS 'Name', 
        Total 
FROM    vendor LEFT JOIN 
        (
            select  sum (podetail.orderqty * podetail.unitcost) AS Total, 
                    podetail.VendorNum, 
                    podetail.Company 
            from    podetail 
            where   exists  (
                                select  1 
                                from    poHeader 
                                where   poHeader.OrderNum = podetail.OrderNum 
                                and     poHeader.ApprovalStatus = 'A'
                                /*-------PLACE THE Date Range Check HERE------*/
                                AND     poheader.orderdate BETWEEN @StartDate AND @EndDate
                            ) 
            and     exists  (
                                select  1 
                                from    vendor 
                                WHERE   vendor.company = 'MyCompany' 
                                and     vendor.VendorNum = podetail.VendorNum 
                                and     vendor.Company = podetail.Company
                            ) 
            group by    podetail.VendorNum, 
                        podetail.Company
        ) OD    ON  vendor.Vendornum = OD.Vendornum   
                and vendor.Company = OD.Company 
WHERE   vendor.company = 'MyCompany' 
ORDER BY    vendor.name

Answer 2

我假设您所说的“添加日期范围”是什么意思。我假设您要过滤掉特定范围内的结果：

 SELECT vendor.Vendorid AS 'ID', vendor.name AS 'Name', Total
FROM vendor 
LEFT JOIN (select sum (podetail.orderqty * podetail.unitcost) AS Total, podetail.VendorNum, podetail.Company 
   from podetail 
   where exists
    (select 1 
    from poHeader 
    where poHeader.OrderNum = podetail.OrderNum and poHeader.ApprovalStatus = 'A') 
/*this line*/ and convert(varchar(8),poHeader.orderdate,112) between '20100101' and '20101231' 
   and exists 
    (select 1 from vendor 
    WHERE vendor.company = 'MyCompany' 
    and vendor.VendorNum = podetail.VendorNum 
    and vendor.Company = podetail.Company) 
   group by podetail.VendorNum, podetail.Company) OD 
  ON vendor.Vendornum = OD.Vendornum  
  and vendor.Company = OD.Company
WHERE vendor.company = 'MyCompany'
ORDER BY vendor.name

为了便于阅读，我已重新格式化。

我也转换为 varchar(8)，但指定范围的参数可以是日期时间：

and poHeader.orderdate between getdate()-10 and getdate() 

Answer 3

看起来第一个exists子句应该修改如下：

(select 1 from poHeader where poHeader.OrderNum = podetail.OrderNum and poHeader.ApprovalStatus = 'A' and poheader.orderdate BETWEEN 'start_date' AND 'end_date's)