如何选择1个表中不存在的数据？

Question

我需要一些sql查询帮助。

我有1个表是dbo.invoice。

| PO_NO  | TYPE   | MOVEMENT_TYPE  | QUANTITY | SALESREF | FLOW | 
|---------- |----------- |--------------- |---------- |---------- |------ | 
| 10001001 | G.RECEIPT  | 101    | 1000.00 | 5001  | S  | 
| 10001001 | G.RECEIPT  | 101    | 2000.00 | 5002  | S  | 
| 10001001 | G.RECEIPT  | 122    | 1000.00 | 5001  | H  | 
| 10001001 | G.RECEIPT  | 122    | 1500.00 | 5002  | H  | 
| 10001001 | INVOICE  |     | 1000.00 | 5001  | S  | 
| 10001001 | INVOICE  |     | 2000.00 | 5002  | S  | 
| 10001001 | INVOICE  |     | 1500.00 | 5002  | H  | 

我需要的输出显示类型= G.RECEIPT没有对TYPE =存在发票SALESREF = 5001 &流量= H的任何数据”，它会diplays这样的： -

| PO_NO  | TYPE   | MOVEMENT_TYPE  | QUANTITY | SALESREF | FLOW | 
|---------- |----------- |--------------- |---------- |---------- |------ | 
| 10001001 | G.RECEIPT  | 122    | 1000.00 | 5001  | H  | 

我该怎么办呢？

修订

这是我当前的查询

SELECT * FROM dbo.INVOICE 
WHERE MVT_TYPE = '122' and TYPE NOT IN (SELECT TYPE FROM DBO.PO where flow ='H') 

Answer 1

使用NOT EXISTS：

SELECT * 
FROM dbo.INVOICE 
WHERE SALESREF = 5001 AND FLOW = 'H' AND NOT EXISTS (SELECT 1 
FROM dbo.INVOICE 
WHERE SALESREF = 5001 AND FLOW = 'H' AND TYPE = 'INVOICE') 

所有SALESREFs：

SELECT * 
FROM dbo.INVOICE i 
WHERE FLOW = 'H' AND NOT EXISTS (SELECT 1 
FROM dbo.INVOICE 
WHERE FLOW = 'H' AND TYPE = 'INVOICE' AND SALESREF = i.SALESREF) 

Answer 2

您可以使用相关NOT EXISTS：

SELECT * FROM dbo.INVOICE i 
WHERE type='G.RECEIPT' 
AND NOT EXISTS(
SELECT * FROM dbo.INVOICE i2 
WHERE type='INVOICE' 
AND i.PO_NO=i2.PO_NO 
AND i.QUANTITY=i2.QUANTITY 
AND i.SALESREF=i2.SALESREF 
AND i.FLOW=i2.FLOW 
) 

这更一般处理的要求，所以它得到所有G.RECEIPT没有的匹配INVOICE，而无需为SALESREF或任何其他列进行硬编码。