Question

How to design a database which has single category and n number of sub categories using mysql

Example:

category

catId categoryName

1 cat 1

2 cat 2

3 cat 3

4 cat 4

subcategory

subCatId subCategoryName catId

1 subcat1 1

2 subcat2 1

3 subcat3 2

4 subcat4 4

For single category i can the above structure.

Like this if i am having n number of subcategories. In this case how should i design the db

thanks in advance

Answer 1

You could use just one table category with columns:

• category_id
• category_name
• parent_category_id

For main categories You set parent_category_id to null and You’re done. 🙂