Question

我有一个查询，我试图将其转换为laravel查询构建器样式。但是我无法成功。

这是我的查询

SELECT
  count(*)
    FILTER (WHERE order_status_id IN (5, 4, 15))        AS ready_for_delivery,
  count(*)
    FILTER (WHERE order_status_id IN (6))               AS out_for_delivery,
  count(*)
    FILTER (WHERE order_status_id IN (4, 10, 9, 12, 7)) AS completed_order,
  count(*)
    FILTER (WHERE order_status_id IN (11, 16, 17, 13))  AS waiting_for_cancellation_return_change
FROM order_item_histories;

这是我从http://www.midnightcowboycoder.com/得到的，显然不起作用。但这是一个起点

DB::table('order_item_histories')
        ->selectSub('count', 'ready_for_delivery')
        ->selectSub('FILTER', 'ready_for_delivery')
        ->selectSub('count', 'out_for_delivery')
        ->selectSub('FILTER', 'out_for_delivery')
        ->selectSub('count', 'completed_order')
        ->selectSub('FILTER', 'completed_order')
        ->selectSub('count', 'waiting_for_cancellation_return_change')
        ->selectSub('FILTER', 'waiting_for_cancellation_return_change')
        ->get();

此查询有效，但它只是原始的。我知道没有害处，但是......

        $aa = DB::table('order_item_histories')
            ->select(DB::raw('count(*)
    FILTER (WHERE order_status_id IN (5, 4, 15))        AS ready_for_delivery,
  count(*)
    FILTER (WHERE order_status_id IN (6))               AS out_for_delivery,
  count(*)
    FILTER (WHERE order_status_id IN (4, 10, 9, 12, 7)) AS completed_order,
  count(*)
    FILTER (WHERE order_status_id IN (11, 16, 17, 13))  AS waiting_for_cancellation_return_change'))
            ->get();

Answer 1

DB::table('order_item_histories')
    ->selectRaw('count(*) FILTER (WHERE order_status_id IN (?, ?, ?)) AS ready_for_delivery', [5, 4, 15])
    ->selectRaw('count(*) FILTER (WHERE order_status_id IN (?)) AS out_for_delivery', [6])
    ->selectRaw('count(*) FILTER (WHERE order_status_id IN (?, ?, ?, ?, ?)) AS completed_order', [4, 10, 9, 12, 7])
    ->selectRaw('count(*) FILTER (WHERE order_status_id IN (?, ?, ?, ?))  AS waiting_for_cancellation_return_change', [11, 16, 17, 13])
    ->get();

Answer 2

尝试使用case代替filter

$users = DB::table('order_item_histories')
                 ->select(DB::raw('SUM(CASE WHEN order_status_id IN (5, 4, 15) THEN 1 ELSE 0 END) AS ready_for_delivery'))
                 ->select(DB::raw('SUM(CASE WHEN order_status_id IN (6) THEN 1 ELSE 0 END) AS out_for_delivery'))
                 ->select(DB::raw('SUM(CASE WHEN order_status_id IN (4, 10, 9, 12, 7) THEN 1 ELSE 0 END) AS completed_order'))
                 ->select(DB::raw('SUM(CASE WHEN order_status_id IN (11, 16, 17, 13) THEN 1 ELSE 0 END) AS waiting_for_cancellation_return_change'))
                 ->get();

使用Count，filter和WhereIn

2 个答案: