Laravel - Get the last entry of each UID type

Question

I have a table that has 100\'s of entries for over 1000 different products, each identified by a unique UID.

ID  UID                 MANY COLUMNS    CREATED          


        

Answer 1

You can use a self join to pick latest row for each UID

select t.*
from yourTable t
left join yourTable t1 on t.uid = t1.uid
and t.created_at < t1.created_at 
where t1.uid is null

Using laravel's query builder it would be similar to

DB::table('yourTable as t')
    ->select('t.*')
    ->leftJoin('yourTable as t1', function ($join) {
        $join->on('t.uid','=','t1.uid')
             ->where('t.created_at', '<', 't1.created_at');
    })
    ->whereNull('t1.uid')
    ->get();

Laravel Eloquent select all rows with max created_at

Laravel Eloquent group by most recent record