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主页 / 问题 / 1410435
Accepted
Pashok
Pashok
Asked:2022-07-16 19:31:22 +0000 UTC2022-07-16 19:31:22 +0000 UTC 2022-07-16 19:31:22 +0000 UTC

如何从不同的表中获取数据量?(2个条件的内连接)

  • 772

有表:

users

+------------+-------------------+------+-----+---------+----------------+
| Field      | Type              | Null | Key | Default | Extra          |
+------------+-------------------+------+-----+---------+----------------+
| id         | int unsigned      | NO   | PRI | NULL    | auto_increment |
| date       | datetime          | NO   |     | NULL    |                |
| refererId  | int               | YES  |     | NULL    |                |
+------------+-------------------+------+-----+---------+----------------+

和表actions

+------------+------------------+------+-----+---------+----------------+
| Field      | Type             | Null | Key | Default | Extra          |
+------------+------------------+------+-----+---------+----------------+
| id         | int unsigned     | NO   | PRI | NULL    | auto_increment |
| userId     | int unsigned     | NO   |     | NULL    |                |
| refererId  | int unsigned     | YES  |     | NULL    |                |
| added      | datetime         | NO   |     | NULL    |                |
| amount     | int unsigned     | NO   |     | 0       |                |
| commission | int unsigned     | NO   |     | 0       |                |
| onHold     | tinyint unsigned | NO   |     | 1       |                |
+------------+------------------+------+-----+---------+----------------+

如何获取按日期分组的注册和操作数量?在表中为每个操作actions创建一行。我添加了两个内部函数并尝试将表名放在计数的 ifs 中,但仍然不是我需要的。我试图这样做,但它只返回当天的活动:

SELECT COUNT(if(amount > 0,1,NULL)) 'actions', COUNT(if(DATE(added) = DATE(date) AND amount != 0,1,NULL)) 'registration',  DATE(added) AS added, SUM(amount) AS amount, SUM(commission) AS comission
FROM actions
INNER JOIN user ref ON ref.id = actions.refererId
#INNER JOIN user use ON use.id = actions.userId
where actions.refererId = 1 AND onHold = 1
group By DATE(actions.added)

结果:

+-------+--------------+------------+--------+-----------+
| actions | registration | added      | amount | comission |
+---------+--------------+------------+--------+-----------+
|     3   |            0 | 2022-05-16 |    210 |        63 |
|     1   |            0 | 2022-04-28 |     15 |         2 |
+---------+--------------+------------+--------+-----------+

我试图这样做,但它只返回当天的注册:

SELECT COUNT(if(amount > 0,1,NULL)) 'actions', COUNT(if(DATE(added) = DATE(date) AND amount != 0,1,NULL)) 'registration',  DATE(added) AS added, SUM(amount) AS amount, SUM(commission) AS comission
FROM actions
#INNER JOIN user ref ON ref.id = actions.refererId
INNER JOIN user use ON use.id = actions.userId
where actions.refererId = 1 AND onHold = 1
group By DATE(actions.added)

结果:

+---------+--------------+------------+--------+-----------+
| actions | registration | added      | amount | comission |
+---------+--------------+------------+--------+-----------+
|      1  |            1 | 2022-04-28 |     15 |         2 |
+---------+--------------+------------+--------+-----------+

预期结果:

+---------+--------------+------------+--------+-----------+
| actions | registration | added      | amount | comission |
+---------+--------------+------------+--------+-----------+
|       3 |            0 | 2022-05-16 |    210 |        63 |
|       1 |            1 | 2022-04-28 |     15 |         2 |
+---------+--------------+------------+--------+-----------+
mysql
  • 1 1 个回答
  • 31 Views

1 个回答

  • Voted
  1. Best Answer
    Pashok
    2022-07-17T11:17:59Z2022-07-17T11:17:59Z

    感谢评论中关于失踪的提示userId。就这样。此外,refererId表中的一列actions是多余的。这个请求是正确的,在修复它之后:

    SELECT COUNT(if(amount > 0,1,NULL)) 'actions', COUNT(if(DATE(added) = DATE(date) AND amount = 0,1,NULL)) 'registration',  DATE(added) AS added, SUM(amount) AS amount, SUM(commission) AS comission
    FROM actions
    INNER JOIN user use ON use.id = actions.userId
    where use.refererId = 1 AND onHold = 1
    group By DATE(actions.added)
    
    • 0

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