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我有一个查询，它将检查一张表中的作废发票，然后检查同一张表以查看作废的发票是否被重新投标。我想知道...是，有没有办法添加一列来查看无效发票是否没有重新投标，并在列中将其列为“N”..

这是我当前的查询：

SELECT        t1.Store_Number, t1.Invoice_Number, t1.Invoice_Date, t1.Vehicle_Tag, t1.Void_Reason, t1.Void_Employee_Tax_Payer_Id, t1.Invoice_Total, t1.Void_Flag, 
                         t2.Invoice_Number AS Expr1, t2.Vehicle_Tag AS Expr2, t2.Invoice_Total AS Expr3
FROM            Invoice_Tb AS t1 INNER JOIN
                         Invoice_Tb AS t2 ON t1.Vehicle_Tag = t2.Vehicle_Tag
WHERE        (t1.Void_Flag = 'y') AND (t1.Invoice_Date BETWEEN CONVERT(DATETIME, '2012-08-01 00:00:00', 102) AND CONVERT(DATETIME, '2012-08-02 00:00:00', 102)) AND 
                         (t2.Void_Flag = 'n') AND (t2.Invoice_Date BETWEEN CONVERT(DATETIME, '2012-08-01 00:00:00', 102) AND CONVERT(DATETIME, '2012-08-02 00:00:00', 102))

这是我当前的输出：

Store Number    Invoice Number  Date    Plate Number    Void Reason Employee    Invoice Amount Voided   New Invoice Number  Plate Number    New Invoice Amount  Re-Tendered
1568    3257714 8/1/2012 0:00   BBY1234 WRONG PRICE ENTERED 89556532    21.39   3257714 BBY1234 26.74   Y

我想要的一个示例：假设发票 #123 已作废，并且从未重新投标...我想显示上述内容并添加一个列标题“重新投标”并在发票所在的位置列出“n”没有重新招标。输出将与此类似：

Store Number    Invoice Number  Date    Plate Number    Void Reason Employee    Invoice Amount Voided   New Invoice Number  Plate Number    New Invoice Amount  Re-Tendered
1568    3257714 8/1/2012 0:00   BBY1234 WRONG PRICE ENTERED 89556532    21.39   3257714 BBY1234 26.74   Y
1552    123 8/1/2012 0:00   Dwb0534 Wrong Plate number  73215654    15.95               N
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1 回答 1

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你需要一个左连接

SELECT        t1.Store_Number, t1.Invoice_Number, t1.Invoice_Date, t1.Vehicle_Tag, t1.Void_Reason, t1.Void_Employee_Tax_Payer_Id, t1.Invoice_Total, t1.Void_Flag, 
                         t2.Invoice_Number AS Expr1, t2.Vehicle_Tag AS Expr2, t2.Invoice_Total AS Expr3, case when t2.Vehicle_Tag is null then 'n' else 'y' end as retendered
FROM            Invoice_Tb AS t1 LEFT JOIN
                         Invoice_Tb AS t2 ON t1.Vehicle_Tag = t2.Vehicle_Tag And
                         (t2.Void_Flag = 'n') AND (t2.Invoice_Date BETWEEN CONVERT(DATETIME, '2012-08-01 00:00:00', 102) AND CONVERT(DATETIME, '2012-08-02 00:00:00', 102))
WHERE        (t1.Void_Flag = 'y') AND (t1.Invoice_Date BETWEEN CONVERT(DATETIME, '2012-08-01 00:00:00', 102) AND CONVERT(DATETIME, '2012-08-02 00:00:00', 102))
于 2012-08-05T16:54:34.990 回答