MySQL 帮助连接表以制作 jasper ireport

Question

首先让我说我不是 sql 专家或 jasper-reports 专家，但我正在尝试生成一份报告，显示每月按公司和客户登录我的项目的人员。我也知道我正在设计查询以查看未来 1 个月，以便我有数据来处理 A 公司注册创建一个或 2 个客户然后不登录或做任何事情的机会。

这是我希望返回的数据的样子：

 Date       Company    Client    Client_ID     Authentications    Unique_Users
 2016-may   Company-A  client-1        1             24                 1
 2016-may   Company-A  client-2        2             10                 2
 2016-may   Company-A  client-3        3             0                  0
 2016-June   Company-A  client-1       1             0                  0
 2016-June   Company-A  client-2       2             0                  0
 2016-June   Company-A  client-3       3             0                  0

我有这个查询，它将返回发生操作的月份的日期、公司名称、客户名称、客户 ID、身份验证和唯一用户。这个查询忽略了没有身份验证的行。

SELECT
     DATE_FORMAT(rq.requestTime, '%Y-%M') AS Date,
     company.name AS Company,
     client.name AS Client,
     client.id AS client_id,
     COUNT(rq.id) AS Authentications,
     COUNT(DISTINCT rq.personguid) AS Unique_Users         
FROM
company JOIN CLIENT ON company.id = client.company_id  
    LEFT JOIN request_queue rq ON rq.clientid = client.id
WHERE
 company.id = 19
 AND rq.status = 'complete' AND rq.request_type LIKE "%authorize%" 
     AND MONTH(rq.requestTime) >= MONTH("2016-05-01") 
     AND MONTH(rq.requestTime) <= MONTH("2016-06-01")
GROUP BY
     client_id, Date
ORDER BY Date ASC, client_id ASC;

这会返回类似这样的东西，因为有些客户在 5 月还没有登录，而 6 月还没有记录，基本上没有 request_queue 数据没有行：

 Date       Company    Client    Client_ID     Authentications    Unique_Users
 2016-may   Company-A  client-1        1             24                 1
 2016-may   Company-A  client-2        2             10                 2

此时我想出了这个。

SELECT
dateTable.mydate AS Date,
clientTable.ClientName AS Client,
clientTable.CompanyName AS Company,
clientTable.client_id AS Client_ID
FROM
(SELECT 
client.name AS ClientName, 
client.id AS client_id,
company.name AS CompanyName 
FROM 
company JOIN CLIENT ON company.id = client.company_id 
WHERE company.id = 19) clientTable
JOIN
(SELECT 
DATE_FORMAT(temp.thedate,'%Y-%M') AS mydate, 
temp.thedate AS theDate FROM (
        SELECT 
    DATE_ADD("2016-05-01", INTERVAL u.i MONTH) AS thedate
        FROM i AS u ORDER BY thedate) temp
        WHERE temp.thedate <= "2016-06-01") dateTable;

这给了我一个没有 request_queue 数据的表，其中包含日期、公司名称、客户名称和客户 ID。

此表如下所示：

Date       Company    Client    Client_ID
2016-may   Company-A  client-1        1
2016-may   Company-A  client-2        2
2016-may   Company-A  client-3        3
2016-June   Company-A  client-1       1
2016-June   Company-A  client-2       2
2016-June   Company-A  client-3       3

有没有办法结合这些数据来获得位于这篇文章顶部的图表？

附加信息： 目标是将我的查询结果传递给 jasper 报表设计器 ireport。我正在使用这些数据创建一个交叉表，其中日期在顶部，客户端在左侧，并将身份验证放在交叉行中。

我从大学几年前就没有接触过 sql。任何想法或指导将不胜感激。

Answer 1

我已经按照你上次查询的方式工作了，这似乎正在产生你需要的东西：

SELECT
    dateTable.mydate AS Date,
    clientTable.ClientName AS Client,
    clientTable.CompanyName AS Company,
    clientTable.client_id AS Client_ID,
    COUNT(rq.id) AS Authentications,
    COUNT(DISTINCT rq.personguid) AS Unique_Users  
FROM
(SELECT 
    client.name AS ClientName, 
    client.id AS client_id,
    company.name AS CompanyName 
    FROM company JOIN CLIENT ON company.id = client.company_id 
    WHERE company.id = 19) clientTable
JOIN (SELECT 
    DATE_FORMAT(temp.thedate,'%Y-%M') AS mydate, 
    temp.thedate AS theDate
    FROM (SELECT
            DATE_ADD("2016-05-01", INTERVAL u.i MONTH) AS thedate
            FROM i AS u ORDER BY thedate) temp
            WHERE temp.thedate <= "2016-06-01") dateTable
LEFT JOIN request_queue rq on (rq.clientid = clientTable.client_ID and DATE_FORMAT(rq.requestTime,'%Y-%M') = dateTable.mydate)
GROUP BY Client_ID, Date
ORDER BY Date ASC, Client_ID ASC;

当然，这是不考虑请求类型和状态的简化版本，但我认为您可以从这里轻松地工作。