Shelly Miron :
I'v got this tables in mySQL database:
Orders:
Order_ID ID_employee ID_Manager
-----------------------------------
123 345 678
234 678 333
146 222 679
personal_info
Person_ID name
----------------------
345 Mickey
333 Mike
222 Jack
I want to get from each table the Order_ID and the names of the employee and his manager. How can i do that? i tried to write a query using INNER JOIN, but failed to understand how to take it from both tables, i also tried to do a sub-query, with no success.
forpas :
You must join orders to 2 copies of personal_info, the 1st to get the employee's name and the 2nd to get the manager's name:
select o.order_id, p1.name employee, p2.name manager
from orders o
inner join personal_info p1 on p1.person_id = o.id_employee
inner join personal_info p2 on p2.person_id = o.id_manager
Guess you like
Origin http://43.154.161.224:23101/article/api/json?id=293288&siteId=1