Question

我试图这样做加入，但它表示没有正确结束任何想法

SELECT      
    first_name, last_name, MAIL_COUNTRY_ID, EMAIL
FROM        
    people, PUBAUTHOR_PEOPLE 
WHERE       
    people.people_id = PUBAUTHOR_PEOPLE.people_id 
JOIN 

select country
from countries
where country c on c.country_id = p.coutry_id

Answer 1

尝试此查询：

SELECT      
  first_name, last_name, countries.country, email
FROM        
  people 
JOIN pubauthor_people ON
  People.people_id = pubauthor_people.people_id 
JOIN countries ON 
   countries.country_id = people.mail_country_id

Answer 2

你应该避免混合标准，并这样做：

select  first_name, last_name, MAIL_COUNTRY_ID, EMAIL, countries.country   
FROM people   
join PUBAUTHOR_PEOPLE on people.people_id = PUBAUTHOR_PEOPLE.people_id  
JOIN countries  on countries.country_id = PEOPLE.country_id

我遇到了这个连接的Oracle连接问题

2 个答案: