Laravel使用Sum和Groupby

Question

我想在每个月中获取数量的总和，以便我可以在条形图上显示数量与月份

这是我的想法，但没有锻炼

 $data1 = Borrow::groupBy(function($d) {
 return Carbon::parse($d->created_at)->format('m')->sum('quantity');
 })->get();

我的桌子结构

Schema::create('borrows', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('member_id');
        $table->integer('book_id');
        $table->integer('quantity');
        $table->integer('status')->default(0);
        $table->timestamps();
    });

Answer 1

一个集合组不是一个雄辩的团队

如果你想用雄辩的话做，那就得：

 $data1 = Borrow::selectRaw('SUM(quantity) as qt, MONTH(created_at) as borrowMonth')
      ->groupBy('borrowMonth')->get();

如果你想用集合groupBy方法做，你应该先做get，然后是groupBy。

就像在，虽然我不确定你在回调中做什么你想要完成什么。

 $data1 = Borrow::get()->groupBy(function($d) {
 return Carbon::parse($d->created_at)->format('m')->sum('quantity');
 });

Answer 2

尝试此查询，您将得到月份计数：

use DB;


 $month_wise_count=DB::table("borrows")
        ->select(DB::raw('CONCAT(MONTHNAME(created_at), "-",  YEAR(created_at)) AS month_year'),
                DB::raw("MONTH(created_at) as month , YEAR(created_at) as year"),
                DB::raw("(COUNT(*)) as total_records"),
                DB::row("(SUM('quantity') as total_value"))
        ->orderBy(DB::raw("MONTH(created_at),YEAR(created_at)"))
        ->groupBy(DB::raw("MONTH(created_at),YEAR(created_at)"))
        ->get();