sql - 访问/SQL 联合

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，我只需要在表中添加一个名为Continuedequals的字段，"Y"用于所有已创建的记录，因为它有超过 5 个项目和"N"所有具有前 5 个项目的记录。

我想知道是否有办法做到这一点而不必完全制作一张新桌子？

提前感谢您在此问题上的任何帮助。

查克

Answer 1

您可以简单地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，您的完整查询将变为：

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
        );