我有一个要求将文件退还给我。我想将每个文件的总金额加起来,然后进行汇总。
看起来像这样:
有文件。
+-------------+----------+
| document_id | owner_id |
+-------------+----------+
| 52f20e4d | ef27737d |
| 3bfdc5aa | ef27737d |
+-------------+----------+
产品附在每个文档上。
+-------------+-------------+-----------+
| product_id | document_id | total_sum |
+-------------+-------------+-----------+
| b60624a7 | 52f20e4d | 10 |
| fcc21801 | 52f20e4d | 5 |
| d5cbe99d | 3bfdc5aa | 3 |
| 5e537533 | 3bfdc5aa | 4 |
+-------------+-------------+-----------+
我的PHP代码:
$result = DB::table('documents as docs')->leftJoin('products as t_products', function($join) {
$join->on('t_products.document_id', '=', 'docs.document_id');
})->where('docs.owner_id', '=', $currentUserId)->select('docs.document_id', 't_products.total_sum')
->get();
return response()->json($result);
我得到以下内容:
[
{
"document_id": "52f20e4d",
"total_sum": "5"
},
{
"document_id": "52f20e4d",
"total_sum": "10"
},
{
"document_id": "3bfdc5aa",
"total_sum": "4"
},
{
"document_id": "3bfdc5aa",
"total_sum": "3"
}
]
但是我只希望看到其中两个条目将汇总total_sum。
喜欢这个:
[
{
"document_id": "52f20e4d",
"total_sum": "15"
},
{
"document_id": "3bfdc5aa",
"total_sum": "7"
}
]
按文档ID和总数的总和分组
$result = DB::table('documents as docs')
->leftJoin('products as t_products', function($join) {
$join->on('t_products.document_id', '=', 'docs.document_id');
})
->where('docs.owner_id', '=', $currentUserId)
->selectRaw('docs.document_id, sum(t_products.total_sum) as total_sum')
->groupBy('docs.document_id')
->get();