a Jan Kowalik 13 éve
380
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.
a Jan Kowalik 13 éve
380
Még több ilyen
wykres
select data,count from order_pack where item-id = 'x' and data = 'last'
=> users.id
skala: 1-5
