przez Jan Kowalik 13 lat temu
416
shop
In a database system, the primary focus is on managing various entities and their relationships. Key entities include items, orders, and users, each with specific attributes such as IDs, names, and statuses.
przez Jan Kowalik 13 lat temu
416
Więcej takich
wykres
select data,count from order_pack where item-id = 'x' and data = 'last'
=> users.id
skala: 1-5
