Question

我想在我的查询中添加一个额外的字段，根据字段（CheckNum）是否返回支票号，该字段的值为“Cash”或“check”。

SELECT t1.DocNum, t0.DocDate, t0.CardName, t0.CardCode, t1.CheckNum, t0.DocTotal
FROM   OVPM t0 INNER JOIN
VPM1   t1 ON t1.docnum = t0.docnum LEFT OUTER JOIN
OACT   t2 ON t2.AcctCode = t1.CheckAct

UNION ALL

SELECT t1.DocNum, t0.DocDate, t0.CardName, t0.CardCode, t1.CheckNum, t0.DocTotal
FROM   ORCT t0 INNER JOIN
       RCT1 t1 ON t1.docnum = t0.docnum LEFT OUTER JOIN
       OACT t2 ON t2.AcctCode = t1.CheckAct

上述查询的示例结果：

                                          CheckNum     DocTotal
3   Alibhai shariff & Sons Ltd  S0003     67901        39663.000000
5   Silverstone Tyres (K) Ltd   S0191     0            93200.000000
6   Lam Limited                 S0167     1372         66380.000000
7   Osho Chemicals Industries   S0198     0            21100.000000

我想要的是什么：

                                          CheckNum     DocTotal           PayType
3   Alibhai shariff & Sons Ltd  S0003     67901        39663.000000       Check
5   Silverstone Tyres (K) Ltd   S0191     0            93200.000000       Cash
6   Lam Limited                 S0167     1372         66380.000000       Check
7   Osho Chemicals Industries   S0198     0            21100.000000       Cash

任何帮助表示感谢。

Answer 1

您可以在此处使用CASE。像这样 -

SELECT t1.DocNum, t0.DocDate, t0.CardName, t0.CardCode, t1.CheckNum, t0.DocTotal,
       CASE WHEN t1.CheckNum = 0 THEN 'Cash' ELSE 'Check' END AS PayType
FROM   OVPM t0 INNER JOIN
       VPM1   t1 ON t1.docnum = t0.docnum LEFT OUTER JOIN
       OACT   t2 ON t2.AcctCode = t1.CheckAct

UNION ALL

SELECT t1.DocNum, t0.DocDate, t0.CardName, t0.CardCode, t1.CheckNum, t0.DocTotal,
       CASE WHEN t1.CheckNum = 0 THEN 'Cash' ELSE 'Check' END AS PayType
FROM   ORCT t0 INNER JOIN
       RCT1 t1 ON t1.docnum = t0.docnum LEFT OUTER JOIN
       OACT t2 ON t2.AcctCode = t1.CheckAct

用于添加字段并根据其他字段填充值的SQL语句

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