I have a category table to name TBL_category And includes the following fields:
nid i identity field
nid parentid name 1 0 mobile 2 0 tablet 3 1 apple 4 3 iphone 5 2 apple 6 5 ipad
and i have a production Table TBL_Productions and foreign key is to nid And includes the following fields:
productid is identity
productid nid name 1 4 iphone x 2 4 iphone xs 3 4 iphone 11 4 4 iphone 11 pro 5 6 ipad air 2 6 6 ipad mini 7 6 ipad new 8 6 ipad pro
My question is:
How can I display all products, when user selected mobile category ?
I have nothing to do with the subcategories, I want all products to be displayed when the mobile or tablet category is selected.
One option uses a recursive query to recover the “mobile” category and all of its descendants, and then brings the products table with a
with cte as ( select nid from tbl_category where name = 'mobile' union all select ca.nid from cte ct inner join tbl_category ca on ca.parentid = ct.nid ) select p.* from tbl_productions p inner join cte ct on ct.nid = p.nid