result based on maximum date with groupBy in laravel - laravel

Question

Here i want to fetch results based on the maximum date from the field so in order to get that i wrote query like this
$latest_reports = Filelist::
select('report_type_id',DB::raw('filename,max(data_date) as latest_date'))
->where('access_id','=',$retailer_supplier_id->id)
->groupBy('report_type_id')
->orderBy('data_date','desc')
->get();
Here is my table please have a look
id access_id filename report_type_id data_date
1 16 filename1 6 2021-02-01
2 16 filename2 6 2021-01-01
3 16 filename3 6 2021-03-01
4 16 filename4 6 2021-04-01
Am getting result like this
id access_id filename report_type_id data_date
4 16 filename1 6 2021-04-01
I want to get result like this
id access_id filename report_type_id data_date
4 16 filename4 6 2021-04-01
Here the first rows filename value is getting..how to solve this

Answer 1

This is a MySQL problem I think. You have specified only one column to group by, but more then one column in the select list so what is presented in those other non-aggregating columns isn't guaranteed to be sensible. Please refer to MySQL Handling of GROUP BY
In SQL I might re-write the query this way:
select * from mytable
where data_date = (select max(data_date) from mytable)
or
select * from mytable
order by data_date
limit 1
depending on my particular needs (and I don't know which is better for you)

Answer 2

UPDATE:
$latest_reports = Filelist::select([
'report_type_id',
'access_id'
DB::raw('MAX(data_date) AS data_date'),
// here can be listed the other fields
])
->where('access_id', $retailer_supplier_id->id)
->groupBy('report_type_id')
->get();
INITIAL:
I had similar working query, just there I had "created_at" timestamp field. Anyway, I think this will work for you:
// assuming, that your table name is "filelist"
$latest_reports = Filelist::select(DB::raw('t.*'))
->from(DB::raw('(SELECT * FROM filelist ORDER BY data_date DESC) t'))
->groupBy('t.report_type_id')
->get();