从 2 个表 SQL Server 创建多级菜单

Question

I create 2 tables like below: Category(id, category_name)
Product(id, product_name, category_id)
How do I create a menu like that with SQL Server?
A category
++ Product 1
++ Product 2 ...
B category
++ Product 3
++ Product 4
Thanks for watching!

Answer 1

You can JOIN the 2 tables and list them according to "category_name". I would do the following:

SELECT * FROM Category INNER JOIN Product ON Category.id = Product.category_id ORDER BY Category.category_name, Product.product_name ASC