Laravel Raw表达式

Question

How do I write a Laravel raw expression that produces this results, I have year, gender and date of birth in my table and my main intention is to group by year as I group ages within ranges from 6-12, 13-17, 18-29... and also get gender count per age range. My table looks like this.

+------+--------+------------+
| year | gender | date_of_b  |
+------+--------+------------+
| 2016 | male   | 2004-05-01 |
| 2016 | male   | 1990-02-09 |
| 2016 | male   | 1960-04-14 |
| 2017 | female | 1975-03-08 |
| 2017 | male   | 1994-07-19 |
| 2017 | female | 2005-03-15 |
| 2018 | male   | 2010-05-30 |
| 2018 | female | 2000-04-11 |
| 2019 | male   | 1988-06-15 |
| 2019 | female | 1980-08-10 |
| 2019 | male   | 1990-03-18 |
+------+--------+------------+

This is the result I want

{ 
   2016: {
     '6-12': {
          male: 0, 
          female: 1 
      },
      '13-17': {
          male: 2, 
          female: 4 
      }
   },
   2017: {
     '6-12': {
          male: 10, 
          female: 12 
      },
      '13-17': {
          male: 21, 
          female: 24 
      }
   }
}

Answer 1

You can do it via collection :

User::get()->groupBy('year')->map(function($users){
    return $users->groupBy('range')->map(function($users){
        return $users->count();
    });
});

Answer 2

DB::table('users')->groupBy('year')->get();

you can try this. And if this is not work show some related code.