How to use withCount by year of birth? - laravel

Question

I have a users table, I need to pull out the count by year of birth.
SQL example:
-- years = [1999, 1997, 1996, ..., 1990] example
SELECT u.city, count(*) -- all count
SUM(IF(u.born_date between '1999-01-01' and '1999-12-31', 1, 0)) as '1999',
SUM(IF(u.born_date between '1998-01-01' and '1998-12-31', 1, 0)) as '1999',
SUM(IF(u.born_date between '1997-01-01' and '1997-12-31', 1, 0)) as '1999'
-- some more years
FROM users u
GROUP BY u.city;
How to do it in Laravel?
upd: I need to take users from another table, while I decided it like this:
$years = [1999, 1997, 1996]; // example
$byYearQueries = [];
$cities = City::query()->where('active', 1);
foreach ($years as $year) {
$byYearQueries['users as y' . $year] = function (Builder $query) use ($year) {
$query->whereHas(
'users',
function ($q) use ($year) {
/** #var Builder $q */
$q
->where(
'born_date',
'>=',
Carbon::make($year . '-01-01')->timestamp
)
->where(
'born_date',
'<=',
Carbon::make($year . '-12-31')->timestamp
);
}
);
};
}
$result = $cities->withCount($byYearQueries)->get();
result: y1999: 20, y1997: 15 ...

Answer 1

Maybe you could try this :
$stats = User::select(DB::raw('city, YEAR(born_date) as year_of_birth, count(*) as count'))
->groupBy(DB::raw('city, YEAR(born_date)'))
->toBase()
->get();
you can if you want create an array with year_of_birth => number of users :
$stats->groupBy('city')->map->pluck('count', 'year_of_birth');
you will have then :
'London' => [
1999 => 204,
2000 => 301,
2001 => 2,
],
'Paris' => [
1999 => 44,
2001 => 30,
...
]
And you will not have to make a query for every year

Answer 2

You can try it:
DB::table('users')
->selectRaw("users.city,
count(*) AS allCount,
(CASE WHEN users.born_date BETWEEN '1999-01-01' AND '1999-12-31' THEN 1 ELSE 0 END) AS year1999),
(CASE WHEN users.born_date BETWEEN '1998-01-01' AND '1998-12-31' THEN 1 ELSE 0 END) AS year1998),
(CASE WHEN users.born_date BETWEEN '1997-01-01' AND '1997-12-31' THEN 1 ELSE 0 END) AS year1997)")
->groupBy('users.city')
->get();