MYSQL具有特定条目数的列的总和

您好，我正在尝试根据以下数据计算过去三个月内多次出现的不同AccountID的数量；我希望查询结果为2，因为test1@gmail.com及test2@gmail.com出现超过1次

accountid         purchase  requesttime
test1@gmail.com   150       2017-01-01
test2@gmail.com   100       2017-01-01
test1@gmail.com   100       2017-01-01
test1@gmail.com   200       2017-01-01
test2@gmail.com   240       2017-01-01
test1@gmail.com   210       2017-01-01
test3@gmail.com   4         2017-01-01
test4@gmail.com   60        2017-01-01

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我认为您需要两个级别的聚合。第一个返回满足条件的电子邮件：

select n.account_id, count(*) as cnt
from ndsbulkstorage22 n
where requesttime >= CURRENT_DATE - interval 3 month
group by accountid
having count(*) > 1;

然后可以将其用作子查询：

select count(*)
from (select n.account_id, count(*) as cnt
      from ndsbulkstorage22 n
      where requesttime >= CURRENT_DATE - interval 3 month
      group by accountid
      having count(*) > 1
     ) n;

---

我认为您需要两个级别的聚合。第一个返回满足条件的电子邮件：

select n.account_id, count(*) as cnt
from ndsbulkstorage22 n
where requesttime >= CURRENT_DATE - interval 3 month
group by accountid
having count(*) > 1;

然后可以将其用作子查询：

select count(*)
from (select n.account_id, count(*) as cnt
      from ndsbulkstorage22 n
      where requesttime >= CURRENT_DATE - interval 3 month
      group by accountid
      having count(*) > 1
     ) n;

---

此查询将显示请求时间前3个月的结果和一些采购字段

MYSQL

select accountid,sum(purchase) as your_sum,requesttime from tbl_sum 
where requesttime <=DATE_ADD(requesttime,INTERVAL -3 month) GROUP BY accountid,requesttime

select accountid,sum(purchase) as your_sum,requesttime from tbl_sum 
where requesttime <=DATEADD(month,-3,requesttime) GROUP BY accountid,requesttim

选择accountid，sum（purchase）作为您的金额，requesttime from tbl\u sum
其中requesttime此查询将显示请求时间前3个月的结果和一些购买字段

MYSQL

select accountid,sum(purchase) as your_sum,requesttime from tbl_sum 
where requesttime <=DATE_ADD(requesttime,INTERVAL -3 month) GROUP BY accountid,requesttime

select accountid,sum(purchase) as your_sum,requesttime from tbl_sum 
where requesttime <=DATEADD(month,-3,requesttime) GROUP BY accountid,requesttim

选择accountid，sum（purchase）作为您的金额，requesttime from tbl\u sum
其中requesttime您声明的需求和尝试的查询不匹配。如果您提供了正确的CREATE和INSERT语句以及所需的结果，这将非常有用。查看您声明的要求和您尝试的查询不匹配。如果您提供了正确的CREATE和INSERT语句以及所需的结果，这将非常有用。看见