Access / SQL Union

Question

SELECT Campaign, Prem1Item, Prem1Qty, Prem1Drop, Prem2Item, Prem2Qty, Prem2Drop, Prem3Item, Prem3Qty, Prem3Drop, Prem4Item, Prem4Qty,  Prem4Drop, Prem5Item, Prem5Qty, Prem5Drop, Prem10ItemPkging, AckLtr1TypeCode, AckLtr10ItemPkging, ContactID
    FROM [TU FAR Before VB]
UNION ALL 
SELECT Campaign, Prem6Item, Prem6Qty, Prem6Drop, Prem7Item, Prem7Qty, Prem7Drop, Prem8Item, Prem8Qty, Prem8Drop, Prem9Item, Prem9Qty, Prem9Drop, NULL, NULL, NULL, Prem10ItemPkging, NULL, AckLtr10ItemPkging, ContactID
FROM [TU FAR Before VB]
WHERE NOT
 (
    (Prem6Item IS NULL) AND (Prem7Item IS NULL) AND (Prem8Item IS NULL)
     AND (Prem9Item IS NULL)
 );

在上面的代码中，一切都很好我只需要为名为Continued的表添加一个字段，该字段等于"Y"，因为它有超过5个项目而创建的所有记录和"N"所有包含前5项的记录。

我想知道是否有办法在不必完全制作新表的情况下执行此操作？

提前感谢您对此事的任何帮助。

查

Answer 1

您只需在每个查询中添加一个硬编码列：

SELECT  ....,
        'N' AS Continued
FROM    ...
UNION ALL
SELECT  ....,
        'Y' AS Continued
FROM    ...

因此，您的完整查询将成为：

SELECT  Campaign, 
        Prem1Item, 
        Prem1Qty, 
        Prem1Drop, 
        Prem2Item, 
        Prem2Qty, 
        Prem2Drop, 
        Prem3Item, 
        Prem3Qty, 
        Prem3Drop, 
        Prem4Item, 
        Prem4Qty,  
        Prem4Drop, 
        Prem5Item, 
        Prem5Qty, 
        Prem5Drop, 
        Prem10ItemPkging, 
        AckLtr1TypeCode, 
        AckLtr10ItemPkging, 
        ContactID,
        'N' [Continued]
FROM    [TU FAR Before VB]
UNION ALL 
SELECT   Campaign, 
        Prem6Item, 
        Prem6Qty, 
        Prem6Drop, 
        Prem7Item, 
        Prem7Qty, 
        Prem7Drop, 
        Prem8Item, 
        Prem8Qty, 
        Prem8Drop, 
        Prem9Item, 
        Prem9Qty, 
        Prem9Drop, 
        NULL, 
        NULL, 
        NULL, 
        Prem10ItemPkging, 
        NULL, 
        AckLtr10ItemPkging, 
        ContactID,
        'Y' [Continued]
FROM    [TU FAR Before VB]
WHERE   NOT
        (       Prem6Item IS NULL
            AND Prem7Item IS NULL
            AND Prem8Item IS NULL
            AND Prem9Item IS NULL
        );