Question

我试图从我的表格作业中返回几行，但也是从表格JobProducts（其中每个JobProduct都有截止日期）的下一个截止日期返回。

到目前为止，我有以下内容

SELECT  J.CustomerID,  J.JobID, J.Status, 
J.Deleted, J.JobNo, Customers.CompanyName AS [Company], 
J.DateCreated AS [Date Created], derivedtbl_1.DueDate AS [Due Date] 
FROM Jobs  J
LEFT OUTER JOIN 
Customers ON J.CustomerID = Customers.CustomerID CROSS JOIN 
(SELECT   TOP (1) DueDate, JobProductID, JobID, ProductID, DepartmentID 
FROM      JobProducts AS JobProducts_1 
WHERE    JobProducts_1.JobID = J.JobID 
ORDER BY DueDate) 
AS derivedtbl_1

但是我得到了错误多部分标识符“J.JobID”无法绑定。

任何帮助将不胜感激

Answer 1

错误似乎来自SQL Server。我认为你将CROSS JOIN（笛卡尔产品）与CROSS APPLY混为一谈：

SELECT  J.CustomerID,  
        J.JobID, 
        J.Status, 
        J.Deleted, 
        J.JobNo, 
        Customers.CompanyName AS [Company], 
        J.DateCreated AS [Date Created], 
        derivedtbl_1.DueDate AS [Due Date] 
FROM Jobs  J
LEFT JOIN Customers 
    ON J.CustomerID = Customers.CustomerID 
CROSS APPLY (SELECT TOP (1) DueDate, 
                           JobProductID, 
                           JobID, 
                           ProductID, 
                           DepartmentID 
            FROM JobProducts AS JobProducts_1 
            WHERE JobProducts_1.JobID = J.JobID 
            ORDER BY DueDate) 
AS derivedtbl_1

Answer 2

您可以尝试更改交叉联接以交叉应用

CROSS APPLY
(SELECT   TOP (1) DueDate, JobProductID, JobID, ProductID, DepartmentID 
FROM      JobProducts AS JobProducts_1 
WHERE    JobProducts_1.JobID = J.JobID 
ORDER BY DueDate)

SQL Cross Join错误无法绑定多部分标识符

2 个答案: