Solved

Median for SQL 2000

Posted on 2006-10-30
9
913 Views
Last Modified: 2012-06-21
Just wondering if there was already a Median function in SQL 2000 that will perform the median by finding the middle number in a column with both even and odd numbers. I've already written a seperate select statement, but was wondering if there were a simpler way. I would also need the Median function to make sure the values in the column were numeric as some of them are 'NA' or 'N/A'-

I've been checking both EE and Googling for answers and their doesn't seem to  be anything consistent- I could be wrong


Thanks
0
Comment
Question by:friskee
  • 5
9 Comments
 
LVL 10

Expert Comment

by:AaronAbend
ID: 17836970
No there is no median function in SQL Server... (I just answered a question to show the code for computing a median on EE about 2 weeks ago)
0
 

Author Comment

by:friskee
ID: 17842660
aaron could you provide a link thnx
0
 

Author Comment

by:friskee
ID: 17867121
I've found a solution thnx
0
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

 

Author Comment

by:friskee
ID: 17905859
AaronAbend, if you will provide me the link to where this question was answered then I'll award you the points for responding to this question
0
 

Author Comment

by:friskee
ID: 18020750
Page monitor, please advise me on how to handle the points for this question- thnx
0
 

Author Comment

by:friskee
ID: 18189761
As the page editor suggested, I'm posting the median solution that  I am using:

Here's the median statement I'm using, it also includes Quartiles and an average, but nonetheless..

SELECT '1. Promptness' AS Quality,
     (
     SELECT AVG(
          CASE
               WHEN prac_promptness NOT IN ('N/A', 'NA')
               THEN Convert(integer,prac_promptness)
               ELSE NULL
          END
          )
     FROM dbo.TBL_EDTL_PRACEVAL
     WHERE prac_term = 'Fall Semester 2006'
     ) [Average Score],

     (
     SELECT SUM(promptness) / COUNT(promptness)
     FROM (
          SELECT TOP 25 PERCENT
               Convert(integer, prac_promptness )as promptness
          FROM dbo.TBL_EDTL_PRACEVAL
          WHERE prac_term = 'Fall Semester 2006'
               AND prac_promptness not in ( 'N/A','NA')
          ORDER BY Convert(integer, prac_promptness)
          ) AS X
     ) AS Quartile1,

     (
     SELECT SUM(promptness)/COUNT(promptness)
     FROM (
          SELECT TOP 25 PERCENT promptness
          FROM (
               SELECT TOP 50 PERCENT Convert(integer, prac_promptness )as promptness
               FROM dbo.TBL_EDTL_PRACEVAL
               WHERE prac_term = 'Fall Semester 2006'
                    AND prac_promptness not in ( 'N/A','NA')
               ORDER by Convert(integer, prac_promptness) DESC
               ) Src
          ORDER BY promptness
          ) tt
     ) AS Quartile3,

     (SELECT
          (SELECT TOP 1 Convert(integer, prac_promptness)
          FROM (
               SELECT TOP 50 PERCENT prac_promptness
               FROM dbo.TBL_EDTL_PRACEVAL
               WHERE prac_promptness NOT IN ( 'N/A','NA')
               ORDER BY Convert(integer, prac_promptness)
               ) s1
          ) +
          (SELECT TOP 1 Convert(integer, prac_promptness)
          FROM (
               SELECT TOP 50 PERCENT prac_promptness
               FROM dbo.TBL_EDTL_PRACEVAL
               WHERE prac_promptness NOT IN ( 'N/A','NA')
               ORDER BY Convert(integer, prac_promptness) DESC
               ) s2
          )
      / 2.0) AS Median

 
0
 
LVL 1

Accepted Solution

by:
Computer101 earned 0 total points
ID: 18200041
PAQed with points refunded (150)

Computer101
EE Admin
0

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

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

Slowly Changing Dimension Transformation component in data task flow is very useful for us to manage and control how data changes in SSIS.
Ever wondered why sometimes your SQL Server is slow or unresponsive with connections spiking up but by the time you go in, all is well? The following article will show you how to install and configure a SQL job that will send you email alerts includ…
Familiarize people with the process of retrieving data from SQL Server using an Access pass-thru query. Microsoft Access is a very powerful client/server development tool. One of the ways that you can retrieve data from a SQL Server is by using a pa…
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.

785 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