I\'m trying to select items from an associative table that have satisfy two or more values of the same field, sounds confusing, let me explain.
Assuming I have the tables student, club, and student_club: student { id name } club { id name } student_club {
Given this table structure and example data (t3 should not be used in the query, it is only here to show the relation between t1 and t2):
So imagine that you have a table of Products (ID int, Name nvarchar(200)), and two other tables, ProductsCategories (ProductID int, CategoryID int) and InvoiceProducts (InvoiceID int, ProductID int).
宋习政 2022-05-25 09:23 开发者_如何学运维 当局者迷，旁观者清【释义】 当局者：下棋的人；旁观者：看棋的人。傍：通“旁”。当事人被碰到的事情搞糊涂了，旁观的人却看得很清楚。 （指局外人清晰地看待问题，
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