Question

I need to know a suitable way to create a table with this info: ID,
Category, Subcategory.

The category has more subcategories, but also I can add new sub, sub category in the future, I tried to create to two tables for category and subcategory, but I will face a vital problem in the future when I need to add a new sub sub category.

So how can solve this issue?

Answer 1

Since you need to add sub sub categories and so on, you need to create only one table categories with ParentCategoryID, something like:

Categories:

• Id,
• Name,
• ParentCategoryID.

Then you can use recursive queries using CTE to get any Categories hierarchy tree for each sub category.