Question

我有一个查询会检查表中的无效发票，然后检查同一个表查看无效发票是否重新招标。我想知道的是......有没有办法添加列以查看如果未重新投标无效发票，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))

这是我目前的输出：

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

我想要的一个例子：让我们说Invoice＃123无效，从未重新招标......我想要显示上面的内容并添加一个列标题“re-tendered”并列出“n”，其中发票不是重新招标。输出类似于：

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

Answer 1

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))

在数据库中列出匹配和不匹配的记录

1 个答案: