?
Solved

How to solve this complex query.

Posted on 2012-03-27
7
Medium Priority
?
247 Views
Last Modified: 2012-03-28
I have a table, in which dataentry is done from 48 locations field is district which are inside some states and those further belong to field called source.
The hierarchy is State,District,Source
In short,
There are 7 states, 48 districts and 3 source
I want to pick up the count  of dataentry done on date range basis and cumulative till to date.
The problem is how to pick those records from district where 0 data entry was done.
Output i need is as follows
State   District  Source   Date Entry Done Cumulative

I am using the following to get the date range data.
select state,district,source,count(*)
from mstchvs where flagr=1 and rfeeddate between '2012-3-1' and '2012-3-31'
group by state,district,source
order by 1,2,3

select state,district,source,count(*)
from mstchvs where flagr=1 and rfeeddate<='2012-3-31'
group by state,district,source
order by 1,2,3

The sample data is attached.
sample-data.xlsx
0
Comment
Question by:searchsanjaysharma
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 12

Expert Comment

by:patrikt
ID: 37775228
If I understand you need to report all State,District combinations even if there is no record in selected range (it is report 0 for it).

You have to join your table to "list" table of districts. Something as this:

select DistricstTable.state,DistricstTable.district,source,count(*)
from DistricstTable
left join mstchvs 
ON DistricstTable.state=mstchvs.state and DistricstTable.district=mstchvs.district
where flagr=1 and rfeeddate<='2012-3-31'
group by DistricstTable.state,DistricstTable.district,source
order by 1,2,3

Open in new window


You can use physical DistrictsTable or construct it from your data if it is possible.
0
 

Author Comment

by:searchsanjaysharma
ID: 37775378
Thats done, but how to get the data within range.
Example if to a query 2 dates are there fromdate and todate
The output shoud be
State District Source Total (Within between dates) Cumulativetotal(Till todate)
0
 
LVL 12

Accepted Solution

by:
patrikt earned 2000 total points
ID: 37775591
I understand now. You need both aggregates in one query.

For this you should use "CASED" counts.
Something like this:
select state,district,source,
count(
       CASE 
         WHEN rfeeddate between '2012-3-1' and '2012-3-31' THEN 1 
         ELSE NULL 
       END) as cnt,
count(
       CASE 
         WHEN rfeeddate<='2012-3-31' THEN 1 
         ELSE NULL 
       END) as cntTill
from mstchvs where flagr=1 and 
group by state,district,source
order by 1,2,3

Open in new window

0
Get real performance insights from real users

Key features:
- Total Pages Views and Load times
- Top Pages Viewed and Load Times
- Real Time Site Page Build Performance
- Users’ Browser and Platform Performance
- Geographic User Breakdown
- And more

 
LVL 12

Expert Comment

by:patrikt
ID: 37775605
Note:
Do not use date literals in form 'YYYY-MM-DD' or other locale dependent form. Parsing of literals is dependent on language settings of connection. It can cause problems.

Only safe form is ISO date exact 'YYYYMMDD'. This is language neutral.
0
 

Author Comment

by:searchsanjaysharma
ID: 37776184
Great, now is it further possible to append the further data for same condition of dates.
and same base data, i.e state,district,source
from other tables like t1 and t2.

The idea is i want to generate the consolidated report from all the tables in horizontal output.
0
 
LVL 12

Expert Comment

by:patrikt
ID: 37776240
If you want partitioned results you should look on window agregate functions also:
COUNT() OVER (PARTITION BY <>)  see syntax in help.
0
 

Author Closing Comment

by:searchsanjaysharma
ID: 37776543
Great
0

Featured Post

Back Up Your Microsoft Windows Server®

Back up all your Microsoft Windows Server – on-premises, in remote locations, in private and hybrid clouds. Your entire Windows Server will be backed up in one easy step with patented, block-level disk imaging. We achieve RTOs (recovery time objectives) as low as 15 seconds.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

by Mark Wills Attending one of Rob Farley's seminars the other day, I heard the phrase "The Accidental DBA" and fell in love with it. It got me thinking about the plight of the newcomer to SQL Server...  So if you are the accidental DBA, or, simp…
In this article I will describe the Copy Database Wizard method as one possible migration process and I will add the extra tasks needed for an upgrade when and where is applied so it will cover all.
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
Visualize your data even better in Access queries. Given a date and a value, this lesson shows how to compare that value with the previous value, calculate the difference, and display a circle if the value is the same, an up triangle if it increased…

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question