Question

我正在使用Cakephp 2.x并且在MYSQL选择连接查询的SUM时遇到以下问题

我有两张名为AccountVoucher＆amp; amp; VoucherDetails

AccountVoucher

+----------+-------------+-------------+
|voucherId | voucherDate | Decription  |
+----------+-------------+-------------+
|    1     | 2014-07-05  | Test DFF    |
+----------+-------------+-------------+
|    2     | 2014-07-02  | Tf DrtF     |
+----+-----+-------------+-------------+
|    3     | 2014-07-05  | Tedgt afF   |
+----------+-------------+-------------+
|    4     | 2014-07-03  | hdt faF     |
+----------+-------------+-------------+

VoucherDetails

+-----------+-----------+-------------+-------------+------------+
| DetailsID | voucherId | DebitAmount | CreditAmount| AccHead    |   
+-----------+-----------+-------------+-------------+------------+
|     1     |     2     |  1200       |    1000     |  AB        |
+-----------+-----------+-------------+-------------+------------+
|     2     |     2     |  1000       |    700      |  AB        |
+-----------+-----------+-------------+-------------+------------+
|     3     |     4     |  500        |    400      |  GH        |
+-----------+-----------+-------------+-------------+------------+
|     4     |     3     |  1500       |    500      |  GH        |
+-----------+-----------+-------------+-------------+------------+

VoucherDetails表必须从AccountVoucher表和

加入

我需要获得每个AccHeads AB和GH的借方总金额和贷方金额，

，结果应为

+----------+-------------+-------------+
|AccHead   | TotalDebit  | TotalCredit |
+----------+-------------+-------------+
|    AB    |    2200     |     1700    |
+----------+-------------+-------------+
|    GH    |    2000     |     900     |
+----------+-------------+-------------+

请帮助......

Answer 1

你需要的sql语句是（目前还不清楚为什么你需要JOIN来获得你需要的结果）：

SELECT AccHead, SUM(DebitAmount) AS TotalDebit, SUM(CreditAmount) AS TotalCredit
FROM VoucherDetails
GROUP BY AccHead;

要在VoucherDetail模型中将其转换为CakePHP：

$this->find('all',
  'fields' => array(
        'AccHead',
        'SUM(DebitAmount) AS TotalDebit',
        'SUM(CreditAmount) AS TotalCredit'),
    'group' => 'AccHead')

Answer 2

工作正常。如果需要，请加载您的模型。

 $query = "select b.AccHead, sum(b.DebitAmount) as TotalDebit ,
 sum(b.CreditAmount) as TotalCredit from AccountVoucher as a ,
 VoucherDetails as b where a.voucherId = b.voucherId group by AccHead";

 $this->ModelName->query($query);

您也可以使用

$this->find('all',
  'conditions' => array('AccountVoucher.voucherId' => 'VoucherDetails.voucherId'),
  'fields' => array(
      'AccHead',
      'SUM(DebitAmount) as TotalDebit',
      'SUM(CreditAmount) as TotalCredit'),
  'group' => 'AccHead');

获取Cakephp中连接字段的总和

2 个答案: