Laravel 5.5 - 按月获取用户和组

Question

我正在尝试从Laravel 5.5数据库中返回所有用户，并按照他们这样注册的月份对它们进行分组..

class AddAttachmentThumbnailToDatabanks < ActiveRecord::Migration[4.2]
  def self.up
    change_table :databanks do |t|
      t.attachment :thumbnail
    end
  end

  def self.down
    remove_attachment :databanks, :thumbnail
  end
end

但是这给了我一个错误

$users = DB::table('users')
     ->orderBy('created_at')
     ->groupBy(DB::raw("MONTH(created_at)"))
     ->get();

我哪里错了？

**更新**

我得到的确切错误消息是......

Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column

Answer 1

您可以尝试：

$users = DB::table('users')
->select('name','email',DB::raw('MONTH(created_at) month'))
->orderBy('created_at', 'asc')
->groupby('month')
->get();