Mysql JOIN 多列[关闭]

Question

这样怎么做？？？

表1

|person_id|name|division|

表2

|job_id|declare|person1_id|person2_id|

输出：

|job_id|declare|person1_name|person2_name|

Answer 1

select t2.job_id, 
       t2.declare, 
       tp1.name as person1_name, 
       tp2.name as person2_name
from table2 t2
left join table1 tp1 on tp1.person_id = t2.person1_id
left join table1 tp2 on tp2.person_id = t2.person2_id