Solved

SQL 2000 GROUP BY OR DISTINCT CLAUSE

Posted on 2006-06-21
3
858 Views
Last Modified: 2008-03-06
I have a table with several columns. I want to SELECT DISTINCT records based on two of the columns values. I also need to retrieve the value of a third column but I don't want it used in the DISTINCT virtual table.

This query gives me the data I need:

SELECT Column1, Column2
FROM Table1
GROUP BY Column1, Column2

I also need in Column3 in my result. If I use this query I get an error because it's not used in the GROUP BY Statement

SELECT Column1, Column2, Column3
FROM Table1
GROUP BY Column1, Column2

Any suggestions?

0
Comment
Question by:mre531s
3 Comments
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 125 total points
ID: 16950457
you have to use some aggregate function like this:

SELECT Column1, Column2, max(Column3)
FROM Table1
GROUP BY Column1, Column2

or add the column to the group by
or add the column to the group by and filter/merge the duplicates in the front-end
or use some more complex subquery technique depending on the results you want to have
0
 
LVL 4

Expert Comment

by:indu_mk
ID: 16950560
select a.column1, a.column2, a.column3 from table1 a,
(select column1, column2 from table1 group by column1, column2) b
where a.column1 = b.column1
and a.column2 = b.column2
0
 

Author Comment

by:mre531s
ID: 16950585
The MAX FUNCTION Will work

Column1      Column2       Column3
John              Doe                1
John              Doe                2
John              Doe                8

The following Example using MAX() will give me a result of

John             Doe                8

I only need 1 value from column 3 as a return value to update the table

Thanks!!!
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Exit the loop 4 49
Get hold of longitude and latitude in iframe string 11 49
VB.NET Repostiory Pattern 7 52
VS 2015 is giving [No relevant source lines] 2 30
If you're writing a .NET application to connect to an Access .mdb database and use pre-existing queries that require parameters, you've come to the right place! Let's say the pre-existing query(qryCust) in Access takes a Date as a parameter and l…
A while ago, I was working on a Windows Forms application and I needed a special label control with reflection (glass) effect to show some titles in a stylish way. I've always enjoyed working with graphics, but it's never too clever to re-invent …
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

821 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