×
The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.
I don't have an answer.... just trying to decipher the requirement:
You are asking for a result set that shows for any set of values for A, B, & C; show the value in Column 4 of the value that occurs most often in column 4? And you want distinct A, B, & C values so that you only see, as in your example, either A1, B1, C1, D2 or A1, B1, C1, D4, but not both.
Result would be:
Either one of these:
Frog, Giraffe, Lion, Cat
Frog, Giraffe, Lion, Ocelot
(You would not want to see: Frog, Giraffe, Lion, Dog)
This one:
Tiger, Giraffe, Lion, Owl
Either one of these three:
Frog, Bison, Lion, Ocelot
Frog, Bison, Lion, Armadillo
Frog, Bison, Lion, Cat
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxxxxxxxx] On Behalf Of Vinay Gavankar
Sent: Tuesday, May 4, 2021 6:57 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Need Help with SQL
Hi,
I need some help with sql.
My table has 4 fields: A, B, C, D
I need my output to be grouped by A, B, C and a value of D which occurs
maximum number of times (if more than one value occurs same number of
times, any of those values is fine).
So if my records are:
A1, B1, C1, D1
A1, B1, C1, D2
A1, B1, C1, D2
A1, B1, C1, D3
A1, B1, C1, D4
A1, B1, C1, D4
A2, B1, C2, D1
My output should be:
A1, B1, C1, D2 or it can be A1, B1, C1, D4
A2, B1, C2, D1
This would be a one time process on about a million records so performance
is not an issue and it need not be a single sql.
TIA
Vinay
As an Amazon Associate we earn from qualifying purchases.
This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact
[javascript protected email address].
Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.