如何在单个查询中获取 MySQL 中所有不同项目的所有总和
How to get all the sum of all the distinct items in MySQL in a single query
如何获得所有不同项目的总和?例如0001 equals 10
和 0002 equals 10
.
什么可能是对下面提供的示例数据的最佳查询(MySQL 或 Laravel 查询生成器)。
tbl_transactions
:
+-------+-----------+-----------+
| id | item_code | quantity |
+-------+-----------+-----------+
| 1 | 0001 | 6 |
| 2 | 0001 | 4 |
| 3 | 0002 | 7 |
| 4 | 0002 | 3 |
+-------+-----------+-----------+
对于 MySQL,一个基本的 GROUP BY
查询应该可以在这里工作:
SELECT item_code, SUM(quantity) AS total
FROM tbl_transactions
GROUP BY item_code;
Laravel代码:
$report = DB::table('tbl_transactions')
->selectRaw('item_code, SUM(quantity) AS total')
->groupBy('item_code')
->get();
试试这个 mysql
select item_code, sum(quantity) as sum
from tbl_transactions
group by item_code;
或
DB::table('tbl_transactions')
->distinct('item_code')
->count('quantity');
你可以试试这个!!!
$report = DB::table('tbl_transactions')
->select([DB::raw("SUM(quantity) as sum"),'item_code'])
->groupBy('item_code')
->get();
如何获得所有不同项目的总和?例如0001 equals 10
和 0002 equals 10
.
什么可能是对下面提供的示例数据的最佳查询(MySQL 或 Laravel 查询生成器)。
tbl_transactions
:
+-------+-----------+-----------+
| id | item_code | quantity |
+-------+-----------+-----------+
| 1 | 0001 | 6 |
| 2 | 0001 | 4 |
| 3 | 0002 | 7 |
| 4 | 0002 | 3 |
+-------+-----------+-----------+
对于 MySQL,一个基本的 GROUP BY
查询应该可以在这里工作:
SELECT item_code, SUM(quantity) AS total
FROM tbl_transactions
GROUP BY item_code;
Laravel代码:
$report = DB::table('tbl_transactions')
->selectRaw('item_code, SUM(quantity) AS total')
->groupBy('item_code')
->get();
试试这个 mysql
select item_code, sum(quantity) as sum
from tbl_transactions
group by item_code;
或
DB::table('tbl_transactions')
->distinct('item_code')
->count('quantity');
你可以试试这个!!!
$report = DB::table('tbl_transactions')
->select([DB::raw("SUM(quantity) as sum"),'item_code'])
->groupBy('item_code')
->get();