Question

I am very new to sql.I need some help in generating summery information

MemberTable

MonthID  | UserID  | TeamID
-----------------------------
  1      |  1       | 1
  1      |  2       | 1
  1      |  3       | 1
  1      |  4       | 1
  1      |  5       | 2
  1      |  6       | 2
  1      |  7       | 2
  

AND

ReportTable

ID* |  MonthID  | UserID  | IsSend
-----------------------------------
 1  |    1      |    2     | False
 2  |    1      |    3     | True
 3  |    1      |    5     | True

I want to generate a summery like the following

TeamID     |  Total Count  |  Send Count | Not Send Count
-----------------------------------------------------------
 1         |      4        |      1      |     3
 2         |      3        |      1      |     2

Total Count : No of users in a team

Send Count : Total User in a team with IsSend = True

Not Send Count : Total Count – Send Count

What would be the efficent way?

Answer 1

select MT.TeamID,
       count(distinct MT.UserID) as "Total Count",
       count(distinct case when RT.IsSend = 1 then MT.UserID end) as "Send Count",
       count(distinct MT.UserID) - count(distinct case when RT.IsSend = 1 then MT.UserID end) as "Not Send Count"
from MemberTable as MT
  left outer join ReportTable as RT
    on MT.MonthID = RT.MonthID and
       MT.UserID = RT.UserID
group by MT.TeamID

Result:

TeamID      Total Count Send Count  Not Send Count
----------- ----------- ----------- --------------
1           4           1           3
2           3           1           2

Try here: https://data.stackexchange.com/stackoverflow/query/66347