Please start any new threads on our new site at We've got lots of great SQL Server experts to answer whatever question you can come up with.

Our new SQL Server Forums are live! Come on over! We've restricted the ability to create new threads on these forums.

SQL Server Forums
Profile | Active Topics | Members | Search | Forum FAQ
Save Password
Forgot your Password?

 All Forums
 SQL Server 2008 Forums
 Transact-SQL (2008)
 Joining Multiple Sub Queries to Master
 Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

Starting Member

24 Posts

Posted - 12/31/2012 :  09:54:53  Show Profile  Reply with Quote
I have huge aggregated view called Customer_Master with > 50 columns with few selected columns as below
ID, EnrolDate, StartDate, StopDate
X1, 21-Sep-11, 23-Sep-11, 24-Sep-11
X2, 24-Sep-12, 24-Sep-12, 25-Sep-12

CallData (Huge table with > 2 million records)
ID, CallDate
X1, 22-Sep-11
X1, 20-Sep-11
X1, 22-Sep-11
X1, 23-Sep-11
X1, 25-Sep-11
X2, 26-Sep-12
X2, 27-Sep-12
X2, 28-Sep-12
X2, 29-Sep-12

I want to query the 2 tables above to get the output in the format below. What is the most efficient way to achieve the below resultset.

ID, EnrolDate, StartDate, StopDate, Calls_Before_Start_Date, Calls_After_Stop_Date, Most_Recent_Call_Date
X1, 21-Sep-11, 23-Sep-11, 22-Sep-11, 3, 1, 25-Sep-11
X2, 24-Sep-12, 24-Sep-12, 25-Sep-12, 0, 4, 29-Sep-12

Flowing Fount of Yak Knowledge

7174 Posts

Posted - 12/31/2012 :  11:00:12  Show Profile  Reply with Quote
Make sure you have clustered index on ID

Select ID,EnrollDate,StartDate,StopDate,Calls_Before_Start_Date,Calls_After_Stop_Date,MAXCallDate
from Customer_Data CT
inner join
Select C.ID,
SUM(Case When CallData < StartDate then 1 Else 0 End)Calls_Before_Start_Date,
SUM(Case When CallData > StopDate then 1 Else 0 End)Calls_After_Stop_Date,
MAX(CallDate) MAXCallDate
from Customer_Master C
inner join CallData D on C.ID = D.ID
Group by C.ID
)T on T.ID = CT.ID

Edited by - sodeep on 12/31/2012 11:00:50
Go to Top of Page
  Previous Topic Topic Next Topic  
 Reply to Topic
 Printer Friendly
Jump To:
SQL Server Forums © 2000-2009 SQLTeam Publishing, LLC Go To Top Of Page
This page was generated in 0.02 seconds. Powered By: Snitz Forums 2000