Laravel 中的自定义查询 [关闭]答案

【问题标题】：Custom Queries in Laravel [closed]Laravel 中的自定义查询 [关闭]
【发布时间】：2018-01-11 01:01:01
【问题描述】：

如何为多个表编写查询，例如

"select  items.id, items.name, sum(qty) as qty  from dispatch_main 
    inner join dispatch_detail on dispatch_main.id = dispatch_detail.id
    inner join items on items.id = dispatch_detail.item_id
    left outer join customers on dispatch_detail.customer = customers.id
    where dispatch_main.entry_type in ('Purchase','Return','Confirmed') and 
    dispatch_main.to_=$location and items.for_customer in ($types)
    group by dispatch_detail.item_id
    order by  items.id
    ";

或

"select items.id, items.name, sum(qty) as qty  from dispatch_main 
    inner join dispatch_detail on dispatch_main.id = dispatch_detail.id
    inner join items on items.id = dispatch_detail.item_id
    left outer join customers on dispatch_detail.customer = customers.id
    where dispatch_main.entry_type in ('Dispatch','Confirmed') and 
    dispatch_main.from_=$location and items.for_customer in ($types)
    group by dispatch_detail.item_id
    order by  items.id
    "

在 laravel 5.4 中？ DB::statement 可以运行这种类型的查询吗？如果我在 DB::statement(''); 中编写相同类型的查询

【问题讨论】：

你为什么不利用模型和关系并使用Eloquent 来做这些查询？
相关（不重复）：stackoverflow.com/questions/28481321/…
SELECT items.id, items.name .... GROUP BY dispatch_detail.item_id 在较新的 MySQL 服务器上是无效的 SQL。请阅读此内容。 psce.com/en/blog/2012/05/15/…
我不想在这里使用 Eloquent 我只想像在简单的 PHP 中那样运行原始查询。

标签： php mysql laravel laravel-5 laravel-query-builder

【解决方案1】：

你应该试试这个：

DB::table('dispatch_main')
   ->select('items.id',DB::raw('SUM(dispatch_main.qty) as qty'))
   ->join('dispatch_detail', 'dispatch_main.id', '=', 'dispatch_detail.id')
   ->join('items', 'dispatch_detail.item_id', '=', 'items.id')
   ->join('customers', 'dispatch_detail.customer', '=', 'customers.id')
   ->whereIn('dispatch_main.entry_type', ['Purchase','Return','Confirmed'])
   ->where('dispatch_main.to_', $location)
   ->whereIn('items.for_customer', $types)
   ->groupBy('dispatch_detail.item_id')
   ->orderBy('items.id')
   ->get()
   ->toArray();

希望这对你有用！！！

【讨论】：

【解决方案2】：

  1 DB::table('dispatch_main')
  2   ->innerJoin('dispatch_detail', 'dispatch_main.id', '=', 'dispatch_detail.id')
  3   ->innerJoin('items', 'dispatch_detail.item_id', '=', 'items.id')
  4   ->leftJoin('customers', 'dispatch_detail.customer', '=', 'customers.id')
  5   ->whereIn('dispatch_main.entry_type', ['Purchase','Return','Confirmed'])
  6   ->where('dispatch_main.to_', $location)
  7   ->whereIn('items.for_customer', $types)
  8   ->groupBy('dispatch_detail.item_id')
  9   ->orderBy('items.id')
 10   ->get()->toArray();
 11
 12

试试这个，永远，永远避免写 RAW 查询，直到你绝对有。

【讨论】：

@ParveenKumar 但是这次我想写原始查询，你能告诉我我该怎么做。我不想使用内部连接等 Laravel 函数
这也很简单，你只需要调用你发布的查询类型的静态方法。就像对上述问题的查询将是
DB::select("select items.id, items.name, sum(qty) as qty from dispatch_main inner join dispatch_detail on dispatch_main.id = dispatch_detail.id inner join items on items.id = dispatch_detail.item_id 在 dispatch_detail.customer = customers.id 上离开外部加入客户，其中 dispatch_main.entry_type 在（'Purchase'，'Return'，'Confirmed'）和 dispatch_main.to_=? 和 items.for_customer 在（？）分组由 dispatch_detail .item_id order by items.id", [$location, $types]);