nested queries in laravel - mysql

Question

Here is my sql, i am struggling to translate this to laravel 5.8 query builder syntax.
SELECT CC AS CountOfVisits, Count(CC) AS Users
FROM
(
SELECT user_id, count(user_id) AS CC FROM mytable
GROUP BY user_id
) AS CC
GROUP BY CC;
I tried this:
$frequency= DB::connection('mysql2')
->select(DB::raw('CC AS CountOfVisits'), DB::raw('Count(CC) AS Users'))
->from(function($sq)
{
$sq->select(DB::raw('user_id, count(user_id) AS CC FROM '))
->from('mytable')
->groupBy('user_id');
})
->groupBy('CC')
->get();
it errors with
Argument 1 passed to Illuminate\Database\Connection::prepareBindings()
must be of the type array, object given, called in
/var/app/portal/vendor/laravel/framework/src/Illuminate/Database/Connection.php
on line 665
Any help would be great thanks

Answer 1

I think the problem you're having is that the returned connection is expecting string for the full query with additional bindings on the second parameter. You can still build it using illuminate's query builder first if you like, then run the select using the generated string.
$query = DB::query()
->select('CC AS CountOfVisits', DB::raw('count(CC) AS Users'))
->fromSub(function (\Illuminate\Database\Query\Builder $query) {
$query->select('user_id', DB::raw('count(user_id) AS CC '))
->from('mytable')
->groupBy('user_id');
}, 'CC')
->groupBy('CC');
$result = DB::connection()->select($query->toSql());