如何在Laravel中按日期将数据分组以查询数据？

Question

我有一个由日期和时间组成的数组，其时间间隔为'x'秒，如下所示[示例1]。

我不确定编写查询以将数据从array [0]到array [1]，array [2]到array [3]分组的方式。

有人可以帮我吗？谢谢。

Example 1:

    array:15 [▼
      0 => "'2018-11-01 00:00:00'"
      1 => "'2018-11-01 00:30:00'"
      2 => "'2018-11-01 01:00:00'"
      3 => "'2018-11-01 01:30:00'"
      4 => "'2018-11-01 02:00:00'"
      5 => "'2018-11-01 02:30:00'"
      6 => "'2018-11-01 03:00:00'"
      7 => "'2018-11-01 03:30:00'"
      8 => "'2018-11-01 04:00:00'"
      9 => "'2018-11-01 04:30:00'"
      10 => "'2018-11-01 05:00:00'"
      11 => "'2018-11-01 05:30:00'"
      12 => "'2018-11-01 06:00:00'"
      13 => "'2018-11-01 06:30:00'"
      14 => "'2018-11-01 07:00:00'"
      15 => "'2018-11-01 07:30:00'"
    ]

我当前的查询如下

$testQuery = DB::Table('receipt_tbl')
    // ->whereRaw('created_at IN (' . implode(',' ,$timeIntv) . ')')
    ->whereBetween('created_at', [ Carbon::createFromTimestamp($startDate) ,  Carbon::createFromTimestamp($endDate)])
    ->where('receipt_type', $receiptObj->id)
    // ->groupBy('group_date')
    ->get();