INNER，OUTER或RIGHT JOIN有3个表，其中一个PK与加入的PK相同但是1st没有

Hello I am currently trying to combine, 3 types of tables. I have mange to do it with 2 that have same values but what happends when you want the a 3rd table that has same pk as second but not first? And I hit a giant brick wall.... how do I solve this issue?Hello I am currently trying to combine, 3 types