SQL Join 与 Order by 和 Group by

Question

您好，我正在尝试从另一个 Excel 工作簿加入 Excel。

第一个表中的主键是 Part_No。这不是主键，因此无法进行 1 对 1 连接。

我想从匹配 LIKE 和 NOT LIKE 关键字的结果中选择最佳订单状态。

WHERE 语句完美运行但 FIRST 语句似乎与 ORDER BY 不匹配，结果有些随机。有时我会收到“已取消”的订单，因为有相同零件的订单在库存中。仅先使用 In Stock 执行内部 Select 时，我才看到这两行。

我在 Excel vba 中使用 Provider=Microsoft.ACE.OLEDB.12.0 进行 ADODB 连接。

怎么了？感谢您的帮助！

SELECT 
    FIRST(o.Part_No), 
    FIRST(o.Order_Desc),
    FIRST(o.Order_Status)
FROM 
    Parts 
LEFT JOIN
    (
        SELECT * 
        FROM Orders
        WHERE 
            Orders.Order_Desc Like '%keyword%' AND 
            Orders.Order_Desc Not Like '%otherkeyword%'
        ORDER BY 
            IIF(Orders.Order_Status = 'In Stock' , 1, 
            IIF(Orders.Order_Status = 'In Transit' , 2, 
            IIF(Orders.Order_Status = 'Ordered' , 3, 
            IIF(Orders.Order_Status = 'Canceled' , 4)))) ASC
    ) AS o
    ON Parts.Part_No = o.Part_No
GROUP BY Parts.Part_No;

这是一个例子。

List Parts
Part No
1
2

List Orders
Part No    Order_Desc         Order_Status
1          keyword            In Stock
1          keyword            Canceled
2          keyword            Ordered
2          not keyword        In Stock
2          keyword            Canceled
3          keyword            Ordered
3          keyword            In Stock
3          keyword            In Stock
5          not keyword        In Stock

What i get
1          keyword            Canceled (seems Random right or wrong)
2          keyword            Ordered

Desired Result
1          keyword            In Stock
2          keyword            Ordered

希望这个例子有帮助！ 我是在这里发帖的新人。对不起，奇怪的桌子

Answer 1

试试这个：

SELECT 
COUNT(o.Part_No), 
FIRST(o.Part_No), 
FIRST(o.Order_Status), 
FIRST(o.Order_No), 
FIRST(o.Order_Desc),
        IIF(Orders.Order_Status = 'In Stock' , 1, 
        IIF(Orders.Order_Status = 'In Transit' , 2, 
        IIF(Orders.Order_Status = 'Ordered' , 3, 
        4))) AS Order_Status_OrderBy

FROM 
Parts 
LEFT JOIN
(
    SELECT * 
    FROM Orders
    WHERE 
        Orders.Order_Desc Like '%keyword%' AND 
        Orders.Order_Desc Not Like '%otherkeyword%'
    ORDER BY 
        Order_Status_OrderBy
) AS o
ON Parts.Part_No = o.Part_No
GROUP BY Parts.Part_No;