Question

我正在寻找如何过滤查询的数据结果，如果某个位置使用特殊的where子句。我很难用文字来解释我想做什么，但这是我的例子：

我有一个查询从一系列位置提取结果：

    Select a.Location, a.Invoice_date, a.service, a.QTY, b.user
    From Invoice_detail as a inner join Invoice_tb as b on 
           a.invoice_number = b.invoice_number and a.location = b.location
    where invoice_date between @startdate and @enddate and Not (a.location = 1 and a.service = 1)
    order by a.location

这给了我以下输出：

Location            Invoice Date        Service     QTY    User
   1                 1/2/16               1          1      Tim
   1                 1/2/16               1          1      Bob
   1                 1/2/16               1          1      Tim
   1                 1/2/16               2          1      Bob                        
   1                 1/2/16               3          1      Bob 
   2                 1/2/16               1          1      Tim
   2                 1/2/16               2          1      Bob
   2                 1/2/16               4          1      Tim
   3                 1/2/16               1          1      Bob
   3                 1/2/16               6          1      Tim
   3                 1/2/16               1          1      Bob

如果位置为“1”，我想不返回服务'1'。但我想要将服务1退回到任何其他位置。所以我希望我的输出看起来像这样：

Location            Invoice Date        Service     QTY    User
   1                 1/2/16               2          1      Bob                        
   1                 1/2/16               3          1      Bob 
   2                 1/2/16               1          1      Tim
   2                 1/2/16               2          1      Bob
   2                 1/2/16               4          1      Tim
   3                 1/2/16               1          1      Bob
   3                 1/2/16               6          1      Tim
   3                 1/2/16               1          1      Bob

Answer 1

在AND NOT(Service = 1 AND Location = 1)条件中添加WHERE：

SELECT 
    a.Location, 
    a.Invoice_date, 
    a.service, 
    a.QTY, 
    b.[user]
FROM Invoice_detail AS a 
INNER JOIN Invoice_tb AS b 
    ON a.invoice_number = b.invoice_number 
    AND a.location = b.location
WHERE 
    invoice_date BETWEEN @startdate AND @enddate
    AND NOT(a.service = 1 AND a.Location = 1)
ORDER BY a.location

DEMO

Where子句用于过滤某些选定数据的结果

1 个答案: