troubleshooting Question

Summarizing 3 columns & getting Aggregate function and Group By error.

Avatar of RUA Volunteer2?
RUA Volunteer2?Flag for United States of America asked on
Microsoft SQL Server
1 Comment1 Solution11 ViewsLast Modified:
/*** This was completely mock up of a query that needs only to sum three columns below. I took out a lot and may have missed some of the basic and commonly known query formats. Please ignore those.  
The problem is that I am getting the dreaded aggregate function and or group by issue. See Below. 
My focus is what do I need to do to make this sum of the 3 columns work correctly? 
It would be great to know how to always keep that function group by error from happening?
With source1
       ROW_NUMBER() Over(Partition by f.freq_key Order By req._request_key desc,req._updated desc) As Row_Num1,
   Sum(f.ded_part + f.coin_part + req.co_pay) as Totals,
from c_request req 
       join c_frequency f on req._request_key = f.req_key
join c_person p on p.person_key = f.person_key
where 1=1
and req.payer_id='Benefit_Me_For_A_Change_Insurance Co.'
and convert(date,req.completed_date) between '2021-04-01' and '2021-04-30'
       ISNULL(co_pay,0) as co_pay,
       where Row_Num1 = 1
  Order By p.ssn_number
When I execute this I get:
Msg 8120, Level 16, State 1, Line ??
Column 'table.one_of_the_key' columns is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause. I did not define the actual column that was in error as this query is much bigger actually. I hope this gives the context of the problem.
"Batchelor", Developer and EE Topic Advisor

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Top Expert 2015

The Distinguished Expert awards are presented to the top veteran and rookie experts to earn the most points in the top 50 topics.

Log in to continue reading
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform for $9.99/mo
View membership options
Unlock 1 Answer and 1 Comment.
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
See how we're fighting big data
The Value of Experts Exchange in My Daily IT Life

Experts Exchange (EE) has become my company's go-to resource to get answers. I've used EE to make decisions, solve problems and even save customers. OutagesIO has been a challenging project and... Keep reading >>


Owner of Outages.IO
Phoenix, Arizona, United States
Member Since 2016
Join a full scale community that combines the best parts of other tools into one platform.
Unlock 1 Answer and 1 Comment.
View membership options
“All of life is about relationships, and EE has made a virtual community a real community. It lifts everyone's boat.”
William Peck

Member since 2004