2个不同的表。 用户和成员显示有关一个的信息

Question

I have these two tables in mySQL, patient and users. In users I have 10 different columns

(
1   id  
2   username    
3   password    
4   salt    
5   email   
6   price   
7   firstname   
8   lastname    
9   univers varchar(255)    
10  studentid    
11  mobphone        
12  treatment 
) 

and in patient I have 12 columns.

Upon logging in with a user account I want to be able to see what's in the patient table. And if I log in with a patient account I want to be able to see what's inside the user table.

How do I connect them?