GROUP BY 和 SUM 跨 2 个表的不同日期

Question

我不确定这是否可以在一个 mysql 查询中实现，所以我可能只是通过 php 组合结果。

我有 2 个表：'users' 和 'billing'

我正在尝试对这两个表中可用的每个日期的总活动进行分组。 'users' 不是历史数据，但 'billing' 包含每笔交易的记录。

在此示例中，我将显示一个用户的状态，我想对创建日期求和，以及我还想按创建日期求和的存款金额。我意识到数据之间存在一些脱节，但我想将所有这些数据放在一起并如下所示显示。这将向我显示所有用户的概览，按他们创建的时间以及总交易旁边的当前状态。

我已经尝试过 UNION 和 LEFT JOIN，但我似乎都无法正常工作。

联合示例非常接近，但不会将日期组合成一行。

(
SELECT
created,
SUM(status) as totalActive,
NULL as totalDeposit
FROM users
GROUP BY created
)
UNION
(
SELECT
created,
NULL as totalActive,
SUM(transactionAmount) as totalDeposit
FROM billing
GROUP BY created
)

我也尝试过使用日期查找表并加入日期，但 SUM 值被多次添加。

注意：我根本不关心 userIds，但这里有它作为示例。

用户表 （“1”状态表示“活动”） （每个用户一条记录）

created     |   userId  |   status

2010-03-01  | 10            |   0
2010-03-01  | 11            |   1   
2010-03-01  | 12            |   1   
2010-03-10  | 13            |   0
2010-03-12  | 14            |   1
2010-03-12  | 15            |   1
2010-03-13  | 16            |   0   
2010-03-15  | 17            |   1

帐单 （为计费“交易”的每个实例创建的记录

created     |   userId  |   transactionAmount   

2010-03-01  | 10            |   50
2010-03-01  | 18            |   50
2010-03-01  | 19            |   100
2010-03-10  | 89            |   55
2010-03-15  | 16            |   50
2010-03-15  | 12            |   90
2010-03-22  | 99            |   150

想要的结果：

created     |   sumStatusActive     |   sumStatusInactive       |   sumTransactions

2010-03-01  | 2                                 |   1                                       |   200
2010-03-10  | 0                                 |   1                                       |   55
2010-03-12  | 2                                 |   0                                       |   0
2010-03-13  | 0                                 |   0                                       |   0
2010-03-15  | 1                                 |   0                                       |   140
2010-03-22  | 0                                 |   0                                       |   150

表转储：

CREATE TABLE IF NOT EXISTS `users` (
  `created` date NOT NULL,
  `userId` int(11) NOT NULL,
  `status` smallint(6) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;


INSERT INTO `users` (`created`, `userId`, `status`) VALUES
('2010-03-01', 10, 0),
('2010-03-01', 11, 1),
('2010-03-01', 12, 1),
('2010-03-10', 13, 0),
('2010-03-12', 14, 1),
('2010-03-12', 15, 1),
('2010-03-13', 16, 0),
('2010-03-15', 17, 1);


CREATE TABLE IF NOT EXISTS `billing` (
  `created` date NOT NULL,
  `userId` int(11) NOT NULL,
  `transactionAmount` int(11) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;


INSERT INTO `billing` (`created`, `userId`, `transactionAmount`) VALUES
('2010-03-01', 10, 50),
('2010-03-01', 18, 50),
('2010-03-01', 19, 100),
('2010-03-10', 89, 55),
('2010-03-15', 16, 50),
('2010-03-15', 12, 90),
('2010-03-22', 99, 150);

Answer 1

试试这个：

Select created, sum(status) as totalActive, sum(transactionAmount) as totalDeposit
From
( (
  SELECT
  created,
  status,
  0 as transactionAmount
  FROM users
)
UNION
(
  SELECT
  created,
  0 as status,
  transactionAmount
  FROM billing
) ) as x group by created

Answer 2

啊。感谢 p.g.I.hall 我能够修改查询并获得我想要的结果：

Select 
createdDate,
SUM(statusSum),
SUM(transactionAmountSum)

From
( (
  SELECT
  created as createdDate,
  sum(status) as statusSum,
 '0' as transactionAmountSum
  FROM users
  GROUP BY createdDate
)
UNION
(
  SELECT
  created as createdDate,
  '0' as statusSum,
  sum(transactionAmount) as transactionAmountSum
  FROM billing
  GROUP BY createdDate
) ) 

as x
group by createdDate

Answer 3

警告-您的users 表没有唯一键。我将在这里大胆猜测一下，您可能应该使用userId 列创建一个主键。

没有主键的表意味着您无法防止不良的重复数据滑入您的表中！啊啊啊！