Showing parent and child in one row - laravel

Question

actually I have a table in a laravel website with data from diffrent joined database tables. But this way I get a row for every child and recurring parent data.
Instead I'd like to have one row per parent data and all childs in the same row.
Looks like a basic problem, but actually I've lost sight.
Any idea?
View:
$rechnungen=DB::select(DB::raw("
select
reintern, krenr, krebez, bnrkenn, bubelegnr, aufnr, sacktonr, sacbez, ustkenn,
TO_CHAR(round(bupbetr*(1+ustproz/100),2), '99G999D99', 'NLS_NUMERIC_CHARACTERS = '',.') as brutto,
wiebez, objktext, vektext
from RECHNUNG re
join BUCHUNG bu on bu.REKEY=re.REKEY
...
join BUCHUNGPOS bup on bup.BUKEY=bu.BUKEY and nvl(BUPARTKZ,0)=0 and bup.KREKEY is null
...
where re_status=0
order by bnr.BNRKENN, bu.BUBELEGNR
"));
Controller:
#foreach ($rechnungen as $re)
<tr>
<td></td>
<td>{{$re->wiebez}} {{$re->objktext}} {{$re->ve_ktext}}</td>
<td>{{$re->krektonr}}</td>
<td>{{$re->krebez}}</td>
<td>{{$re->bnrkenn}} {{$re->bubelegnr}}</td>
<td>{{$re->aufnr}}</td>
<td>{{$re->sacktonr}} {{$re->sacbez}}</td>
<td class="text-right">{{$re->ust_kenn}}</td>
<td class="text-right">{{$re->brutto}} €</td>
</tr>
#endforeach

Answer 1

Looks like you just need to create a relation Many To Many https://laravel.com/docs/5.8/eloquent-relationships#many-to-many

Answer 2

In an attempt to understand your issue in English:
You appear to have 3 tables:
Table BILL: Columns REKEY + various data
Table BOOKING: Columns BUKEY + REKEY + various data
Table BOOKINGPOS: Columns BUPKEY + BUKEY + various data
Where BOOKING.REKEY is a foreign key reference to BILL.REKEY and BOOKINGPOS.BUKEY is a foreign key reference to BOOKING.BUKEY.
I assume that each BILL can have multiple BOOKINGs and each BOOKING can have multiple BOOKINGPOSs.
The problem you are having is a display/view issue, not a data/model issue. In pseudo-code, you should implement your view as follows:
{{ $last_rekey="" }}
#foreach( $rows as $row )
#if( $row->rekey != $last_rekey )
#if( $last_rekey != "" )
</tr>
#endif
<tr>
<td>$row->BILLdata1</td>
<td>$row->BILLdata2</td>
...
$last_rekey=$row->rekey
#endif
<td>$row->BOOKINGdata1</td>
<td>$row->BOOKINGdata2</td>
...
<td>$row->BOOKINGPOSdata1</td>
...
#endforeach
</tr>
The idea being that whenever a row of data contains a new BILL, you start displaying a new row in the table, otherwise, you just continue adding cells to the current row.