Laravel: Joining multiple select statements - mysql

Question

I have a survey app.
Each SurveyResponse has multiple QuestionResponses.
For reporting purposes I want to filter the QuestionResponses based on values answered for other QuestionResponses that are part of the same SurveyResponse - eg. Give me all the question responses of those that selected Male for the Genderquestion.
The following example SQL query is working, but I am struggling to replicate it in Laravel:
SELECT *
FROM ( SELECT *
FROM ( SELECT *
FROM question_responses ) AS A
JOIN ( SELECT survey_response_id AS JOIN_A
FROM question_responses
WHERE (question_short_name = 'Gender') AND (value = 'Male')) AS B
ON A.survey_response_id= JOIN_A) AS C
JOIN ( SELECT survey_response_id AS JOIN_B
FROM question_responses
WHERE (question_short_name = 'Age') AND (value = '45 to 54')) AS D
ON C.survey_response_id=JOIN_B
How would I do this using Eloquent or Laravel's query builder?

Answer 1

You can use DB::select method to retrieve result.
use Illuminate\Support\Facades\DB;
$results = DB::select("SELECT *
FROM ( SELECT *
FROM ( SELECT *
FROM question_responses ) AS A
JOIN ( SELECT survey_response_id AS JOIN_A
FROM question_responses
WHERE (question_short_name = ?) AND (value = ?)) AS B
ON A.survey_response_id= JOIN_A) AS C
JOIN ( SELECT survey_response_id AS JOIN_B
FROM question_responses
WHERE (question_short_name = ?) AND (value = ?)) AS D
ON C.survey_response_id= JOIN_B", ['Gender', 'Male', 'Age', '45 to 54']);
foreach ($results as $key => $row) {
print_r($row);
}

Answer 2

You can use the eloquent relationship, but if you want to use this particular type of query then you can use the DB class in laravel.
use Illuminate\Support\Facades\DB;
$data = DB::select(DB::raw('SELECT *
FROM ( SELECT *
FROM ( SELECT *
FROM question_responses ) AS A
JOIN ( SELECT survey_response_id AS JOIN_A
FROM question_responses
WHERE (question_short_name = 'Gender') AND (value = 'Male')) AS B
ON A.survey_response_id= JOIN_A.your_id) AS C
JOIN ( SELECT survey_response_id AS JOIN_B
FROM question_responses
WHERE (question_short_name = 'Age') AND (value = '45 to 54')) AS D
ON C.survey_response_id=JOIN_B.your_id'))
after getting the response you can retrieve the data by $data[0]['key'] for using '->' or making it collection you can use the Collection class.
use Illuminate\Support\Facades\DB;
use Illuminate\Database\Eloquent\Collection;
$tempData = Collection::make(DB::select(DB::raw('select query'));
($tempData[0])->key;