mysql - 在同一个表上使用不同的 group By 子句连接 2 个查询的结果

Question

我有 2 个查询，如下所示，

query1 = select department as 'Department_name', firstname as 'FirstName', lastname as 'LastName', manager as 'Manager', 
title as 'Title', firstofficer as 'First_Officer', email as 'Email', resourceName as 'Resource Name', 
entitlementName as 'Ent Name', concat(resourcename, entitlementname) AS 'Entitlements', count(distinct uid) 
as 'Total_Common' from outlier_report or1 
group by department, concat(resourcename, entitlementname) 


query2 = select department as 'Department_name', 
count(distinct uid) AS 'Total count of user',
count(distinct resourcename) AS 'Total resource count', 
count(distinct concat(resourcename,entitlementname)) as 'Total  Ent Count' 
from outlier_report or2 group by department;

每个查询返回不同数量的结果(基于 group by 子句分别为 115 和 125) 我必须连接这两个结果，以便拥有所有字段和 4 个计数(第 1 个为 1，另一个为 3)。 如何使用 SQL 连接或使用 Java 程序将单独的查询结果操作为 1 个输出 csv 来执行此操作。

Answer 1

每个查询都是一个“ View ”，因此您可以直接加入它们。由于您在两个查询中查询同一个表而不进行过滤(where 子句)，因此内部联接很好:

select a.department, a.AA, a.BB, b.CC, b.DD
  from ( select department, AA, BB
           from outlier_report
          group by department, concat(resourcename, entitlementname)
       ) a
  join ( select department, CC, DD
           from outlier_report
          group by department
       ) b on a.department = b.department