Laravel 用 where 求和，用 Eloquent 求别名

Question

我有一个旧的 Codeigniter 项目查询：

$this->db->select("SUM(source = 'FBS) AS facebook");
$this->db->select("SUM(source = 'FBS' AND promotion = 0) AS facebook_promotion");
$this->db->select("SUM(source = 'IG') AS instagram");
$this->db->select("SUM(source = 'LP') AS landing_page");

我希望使用 Laravel 获得相同的结果，如果可能的话，使用 Eloquent 而不是查询生成器或原始查询。

Answer 1

如果你想使用原始查询生成器，就像，

DB::table('table_name')->where('source','=','FBS')->sum('source');

对于 Eloquent 个模型，

 Model::where('source','=','FBS')->sum('source')

它也适用于 eloquent 关系。

此外，对于像您这样的多个总和结果，它会像，

DB::table('table_name')->get( array(
  DB::raw("SUM(source = 'FBS) AS facebook"),
  DB::raw("SUM(source = 'FBS' AND promotion = 0) AS facebook_promotion"),
));

Answer 2

使用DB::raw;

以这种方式解决

$data = CONTACT::select(
    DB::raw('DATE_FORMAT(created_at, "%m-%d-%Y")),
    DB::raw('SUM(source = "IG") as instagram'),
    DB::raw('SUM(source = "FBS") as facebook')
)
->orderBy('data', 'DESC')
->groupBy(DB::raw("DATE_FORMAT(created_at, '%d-%m-%Y')"))
->get();
return response()->json(['success' => $data], 200);

Laravel 用 where 求和，用 Eloquent 求别名

Laravel Sum with where and alias with Eloquent

laravel

codeigniter

eloquent

sum