Question

我有一个“User”表，其中包含UserId和addedDate字段。

我需要获取用户数据 - 在添加日期之前的上个月和当月添加，而不是在系统中添加90天。

用户表

13:00:28,442 INFO  [org.springframework.web.context.ContextLoader] (ServerService Thread Pool -- 29) Root WebApplicationContext: initialization completed in 1027 ms
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13:00:38,634 INFO  [org.jboss.as.server.deployment.scanner] (DeploymentScanner-threads - 2) WFLYDS0004: Found taml-nbl.war in deployment directory. To trigger deployment create a file called taml-nbl.war.dodeploy

我需要输出：

Userid      addedDate         enddate
001        2017-07-01       2017-09-05
002        2017-02-25       2017-02-01
003        2017-06-01       2017-09-21
003        2017-04-25       2017-05-29
004        2017-06-01       2017-09-21  
005        2017-06-05       2017-09-07
005        2017-01-01       2017-01-31

此处不需要003，因为它不是新用户（在添加日期之前90天的可用系统）。在最后一只飞蛾或当前飞蛾中没有加入002，所以这也不能作为新用户考虑。

我已尝试过以下查询，但效果不佳：

userid
  001
  004
  005

请提供一些建议。

Answer 1

您需要使用INNER查询来获得结果：

SELECT *
FROM users
WHERE addedDate >= DATE_ADD(NOW(), INTERVAL -2 MONTH)
AND userid NOT IN (
    SELECT userid 
    FROM users
    WHERE addedDate < DATE_ADD(NOW(), INTERVAL -2 MONTH)
);

有几点：

Userid 003在系统中addedDate前90天不可用（2017-06-01 vs 2017-04-25，即37天），所以它可能与选择标准相同（即不是本月或上个月）？
用户ID 005在addedDate之前90天（或上个月）可用，因此不应该提取

这是 SQL Fiddle 。

MySql查询：如何从给定的日期值中选择过去90天内不存在的数据？

1 个答案: