SQL - 查找丟失的數據/負搜索

Question

從我的其他帖子下面就...我有一個使用兩個字段做一個主鍵的表...

TravelEventID RemarkNo Keyword  Text 
0001   1   TVL   LOWCOST BOOKING 
0001   2   TVL   CREDIT CARD USED 
0001   3   PSG   COST CENTRE REQUIRED 
0001   4   PSG   EMPLOYEE NUM REQUIRED 
0002   1   TVL   CREDIT CARD USED 
0002   2   AGT   BOOKED BY AGENT 
0002   3   AGT   CONFIRM WITH AIRLINE 
0002   4   TVL   LOWEST FARE CONFIRMED 
0002   5   TVL   NO CANCELLATION CHARGE 
0003   1   TVL   LOWCOST BOOKING 
0003   2   TVL   CARRIER : EASYJET 
0003   3   TVL   LOWEST FARE CONFIRMED 
0004   1   TVL   LOWCOST BOOKING 
0004   2   TVL   CREDIT CARD USED 

我需要提取TravelEventID哪裏該文本不包含LOWCOST預訂。 I.E從示例表我只想要0002.

我嘗試並執行一個查詢，其中文本<>'LOWCOST BOOKING'然而，這顯然與大多數行匹配，因此我找回所有TravelEventID。

希望我已經解釋了我自己！ 乾杯 達倫

Answer 1

SELECT DISTINCT T.TravelEventID 
    FROM Table T 
WHERE NOT EXISTS(SELECT * FROM Table T2 WHERE T.TravelEventID = T2.TravelEventID AND T2.Text = 'LOWCOST BOOKING') 

Answer 2

你可以嘗試這樣的事情

SELECT DISTINCT TravelEventID 
FROM Table WHERE TravelEventID NOT IN (
SELECT TravelEventID 
FROM Table 
WHERE Text = 'LOWCOST BOOKING' 
)