Distinct Values in Laravel - php

Question

Hello Friends I am using the following query :
$cur_date = date('Y-m-d');
$clientTemp = DB::table('clients')->where('quotations.exp_date','<',$cur_date)
->join('quotations','quotations.customer_id','=','clients.id')
->get()
->map(function ($clientTemp) {
return [
'id' => $clientTemp->id,
'hash' => $clientTemp->hash,
'name' => $clientTemp->first_name.' '.$clientTemp->last_name,
'email' => $clientTemp->email,
'mobile' => $clientTemp->mobile
];
});
I am getting this data from two tables :
1. Qutoations and 2. Clients.
In quotations table if the exp_date is less than current date then the details will be fetched from client table.
But there is possibility then there are more than 1 rows in quotation table but I want to fetch only one table from that for which customer_id is unique. How can I fetch unique row with same customer_id from quotations table

Answer 1

You'd need to use a GROUP BY clause but due to MySQL's default ONLY_FULL_GROUP_BY mode, you must aggregate any column that has more than one value.
You don't seem to be actually using any values from quotations, so you could just add:
DB::table('clients')->select('clients.*')->groupBy('clients.id')...
Otherwise, you'd need to tell MySQL how to aggregate any rows that have multiple values, like:
DB::table('clients')->selectRaw('clients.*, MIN(quotations.id)')->groupBy('clients.id')...

Answer 2

You should use groupby
$cur_date = date('Y-m-d'); $clientTemp = DB::table('clients')->where('quotations.exp_date','<',$cur_date)
->join('quotations','quotations.customer_id','=','clients.id')
->->groupBy('quotations.customer_id')
->get()
->map(function ($clientTemp) {
return [
'id' => $clientTemp->id,
'hash' => $clientTemp->hash,
'name' => $clientTemp->first_name.' '.$clientTemp->last_name,
'email' => $clientTemp->email,
'mobile' => $clientTemp->mobile
];
});