laravel子查询，其中和最大值

Question

我是新手，laravel和MySQL

MySQL查询是

select * from table where id in (select max(id) from table group by thread_id)

我的表是

id thread_id 
1 45a7 
2 123c 
3 45a7 
4 d056 
5 123c 

输出mysql表是

id thread_id 
3 45a7 
5 123c 
4 d056 

在这里，我试图把我的MySQL查询laravel如下

MODEL::whereIn('id', function($query){ $query->groupBy('thread_id')})->get();

什么是我做错了吗？下面

Answer 1

的应该符合您查询

Model::whereIn('id', function($query) { $query->selectRaw('max(id)')->from('table')->groupBy('thread_id'); })->toSql(); 

这将输出

select * from "table" where "id" in (select max(id) from table group by "thread_id")