從表中選擇字段，其中id不在mysql的另一個表中[不起作用]

Question

我正在嘗試從一個表中獲取數據，並且該ID不在另一個表中。 我引用了一些代碼示例來解決此問題，但仍然無法正常工作。 我為此嘗試了兩種樣式。 我嘗試過的sql代碼如下，請幫助我。 謝謝。

樣式1

SELECT *
FROM quotation q
WHERE q.quotationId NOT IN (SELECT ip.quotation_id FROM invest_project ip)

風格2

SELECT *
FROM quotation q
LEFT JOIN invest_project ip
ON q.quotationId = ip.quotation_id
WHERE q.quotationId IS NULL

Answer 1

嘗試不使用別名...

SELECT * FROM quotation WHERE quotation.quotationId NOT IN (SELECT quotation_id FROM invest_project)

Answer 2

當您指定不顯示空值數據的條件時，請嘗試此操作

SELECT *
FROM quotation q
WHERE q.quotationId NOT IN (SELECT ip.quotation_id FROM invest_project ip) or q.quotationId is null

Answer 3

Select *  
from [Table1] AS T1  
where not exists( select * from [Table2] AS T2 where T1.ID = T2.ID)  

這對我有用