Solved

Calculating Quarterly average from monthly data

Posted on 2009-05-08
10
937 Views
Last Modified: 2012-05-06
Hi
In my application I need to calculate Quarterly average for Dow 30..
I have montly data available for dow30.
I need to generate quarterly and half yearly data from monthly data.
I need to create a stored Proc for this.
I am using Sql server 2005.
Any help will appreciated.
Thanks
0
Comment
Question by:ken_rgr
  • 6
  • 2
  • 2
10 Comments
 
LVL 75

Expert Comment

by:Aneesh Retnakaran
ID: 24336835


SELECT SUM(UrColumn) Total, DATENAME (qq, urDAteColumn ) as Quarter
FROM urTable
GROUP BY DATENAME (qq, urDAteColumn )
0
 
LVL 41

Expert Comment

by:pcelba
ID: 24336929
How do you identify month in your data? Is a date or string?

As the rough estimation you may use following (suppose monthNr is numeric month number 1 - 12, YearNr is four digits Year number):

SELECT cast((monthNr-1)/3 AS int)+1 Quarter, YearNr, AVG(monthlyValue)
  FROM YourTable
 GROUP BY cast((monthNr-1)/3 AS int), YearNr

SELECT cast((monthNr-1)/6 AS int)+1 HalfNr, YearNr, AVG(monthlyValue)
  FROM YourTable
 GROUP BY cast((monthNr-1)/6 AS int), YearNr

0
 

Author Comment

by:ken_rgr
ID: 24336993
The above solution is returning just 4 rows of data.
I have 10 years of monthly data(120 rows).
 That means it should return 30 rows.
Any better solution ???
0
 
LVL 41

Expert Comment

by:pcelba
ID: 24337023
The SP creation is also easy but you have to know how it should store/return results. If you just need above SELECTs in SP execute the following code (updated to your structures). You may create input parameters for date range in this SP etc.

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO
 

CREATE PROCEDURE sp_quarterlyData 
 

AS

BEGIN

SET NOCOUNT ON;
 

SELECT cast((monthNr-1)/3 AS int)+1 Quarter, YearNr, AVG(monthlyValue)

  FROM YourTable

 GROUP BY cast((monthNr-1)/3 AS int), YearNr
 

END

GO

Open in new window

0
 
LVL 75

Expert Comment

by:Aneesh Retnakaran
ID: 24337060
SELECT SUM(UrColumn) Total, DATENAME (qq, urDAteColumn ) as Quarter , YEAR (urDateColumn ) as [Year]
FROM urTable
GROUP BY DATENAME (qq, urDAteColumn ) ,YEAR (urDateColumn )
0
Zoho SalesIQ

Hassle-free live chat software re-imagined for business growth. 2 users, always free.

 
LVL 41

Expert Comment

by:pcelba
ID: 24337071
My solution does not return just 4 rows.If you have date column then you may update it:

SELECT Datepart(qq, YourDate) Quarter, DatePart(yy, YourDate) YearNr, AVG(monthlyValue)
  FROM YourTable
 GROUP BY Datepart(qq, YourDate), DatePart(yy, YourDate)

0
 
LVL 41

Accepted Solution

by:
pcelba earned 500 total points
ID: 24337105
Half year data:

SELECT cast((Datepart(mm, YourDate)-1)/6 AS int)+1 HalfNr, DatePart(yy, YourDate) YearNr, AVG(monthlyValue)
  FROM YourTable
 GROUP BY cast((Datepart(mm, YourDate)-1)/6 AS int), DatePart(yy, YourDate)

0
 
LVL 41

Expert Comment

by:pcelba
ID: 24337336
The more accurate way would be to calculate half year and quarterly data from daily data because it reflects number of business days.
0
 

Author Comment

by:ken_rgr
ID: 24337460
Hi guys

Thank You very much for your Immediate response.
I am overwhelmed.
I am getting Quarterly averages for all the indexes.
But my table has 2 indexes one is Dow and second one is S&P.
how to get different avarages for these 2 separately
0
 
LVL 41

Expert Comment

by:pcelba
ID: 24340515
The groupping will remain unchanged, you just have to add one more column for S&P average calculation:

SELECT Datepart(qq, YourDate) Quarter, DatePart(yy, YourDate) YearNr, AVG(monthlyDOWValue) DOWavg, AVG(monthlySaPValue) SaPavg
  FROM YourTable
 GROUP BY Datepart(qq, YourDate), DatePart(yy, YourDate)

BTW, why you are not interested in NASDAQ?
0

Featured Post

NAS Cloud Backup Strategies

This article explains backup scenarios when using network storage. We review the so-called “3-2-1 strategy” and summarize the methods you can use to send NAS data to the cloud

Question has a verified solution.

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

Foreword (May 2015) This web page has appeared at Google.  It's definitely worth considering! https://www.google.com/about/careers/students/guide-to-technical-development.html How to Know You are Making a Difference at EE In August, 2013, one …
In this article we will get to know that how can we recover deleted data if it happens accidently. We really can recover deleted rows if we know the time when data is deleted by using the transaction log.
This video teaches viewers how to create their own website using cPanel and Wordpress. Tutorial walks users through how to set up their own domain name from tools like Domain Registrar, Hosting Account, and Wordpress. More specifically, the order in…
Learn how to set-up PayPal payment integration in your Wufoo form. Allow your users to remit payment through PayPal upon completion of your online form. This is helpful for collecting membership payments, customer payments, donations, and more.

920 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

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now