Laravel Eloquent：多重選擇和where子句查詢

Question

我試圖獲取一個查詢，該查詢從我的銷售表中吐出：

For each `Brand`    
   `Brand` {
      this month `sum(quantity)`
      this month last year `sum(quantity)`
      this year `sum(quantity)`
      this last year `sum(quantity)`
      `Brand` name
    }
    Next `Brand` {
      this month `sum(quantity)`
      this month last year `sum(quantity)`
      this year `sum(quantity)`
      this last year `sum(quantity)`
      `Brand` name
    }

我有這個，但它不會吐出任何東西。 如果我刪除位置，它將獲得的金額只是不在我需要的日期范圍內，所以我知道它的問題。 我不確定是否可以在多個地方進行

public function sales()
    {

        return $this->hasMany('App\Sale', 'account_vip_id', 'vip_id')
                                     ->select('brand', DB::raw('sum(quantity) as month'))->whereMonth('date','=',date('m'))
                                     ->addSelect('brand', DB::raw('sum(quantity) as month_last'))->whereDate('date','=',date('m Y',strtotime("-1 year")))
                                     ->addSelect('brand', DB::raw('sum(quantity) as year'))->whereYear('date','=',date('Y'))
                                     ->addSelect('brand', DB::raw('sum(quantity) as year_last'))->whereYear('date','=', date("Y",strtotime("-1 year")))
                                     ->groupBy('brand');

    }

Answer 1

不幸的是，SQL不能像這樣工作。 您需要將where子句放在sum函數內。 我創建了一個快速查詢，以使您更好地了解我在說什么...

SELECT 
    brands.name,
    SUM( IF( DATE_FORMAT(NOW(), '%y-%m') = DATE_FORMAT(sales.created_at, '%y-%m'), sales.quantity, 0) ) AS `month`,
    SUM( IF( DATE_FORMAT(DATE_SUB(NOW(), INTERVAL 1 MONTH), '%y-%m') = DATE_FORMAT(sales.created_at, '%y-%m'), sales.quantity, 0) ) AS `last_month`,
    SUM( IF( YEAR(CURDATE()) = YEAR(sales.created_at), sales.quantity, 0) ) AS `year`,
    SUM( IF( YEAR(CURDATE()) - 1 = YEAR(sales.created_at), sales.quantity, 0) ) AS `last_year`
FROM brands
INNER JOIN sales ON brands.id = sales.brand_id
GROUP BY brands.name;