php - Mysql 连接多列

Question

我遇到一个问题，我想通过 ID 连接多个列。

我的第一个表如下所示:

submitter_id   reviewer_id   processor_id
75             34            91

我想要加入的表如下所示:

id   first_name   last_name
75   Bob          Smith
34   Albert       McDonald
91   Joe          Blo

我正在尝试创建一个查询，该查询将查看第一个表中的每个 id，然后获取每个 id 的名字和姓氏。

例如，执行此操作的查询应返回类似以下内容的内容:

[
    75 => "Bob Smith",
    34 => "Albert McDonald",
    91 => "Joe Blo"
];

任何人都可以帮我构造一个可以完成此任务的查询吗？谢谢!

Answer 1

使用不同的别名连接同一个表 3 次

select t1.submitter_id, t1.reviewer_id, t1.processor_id,
       t2.first_name as submitter_firstname, t2.last_name as submitter_lastname,
       t3.first_name as reviewer_firstname, t3.last_name as reviewer_lastname,
       t4.first_name as processor_firstname, t4.last_name as processor_lastname
from firstTable t1
left join namesTable t2 on t1.submitter_id = t2.id
left join namesTable t3 on t1.reviewer_id = t3.id
left join namesTable t4 on t1.processor_id = t4.id