Select Non-Aggregated Field in a Query

Good morning,
This should be easy but I can't figure it out.
You have a table with three fields; Salesperson, Quarter, Sales(value)
Build a query that outputs the best sales quarter for each salesperson (i.e. Max(Sales), Group by Salesperson) that includes the quarter. I don't want to group by the quarter because I just get the whole list.
Advice please,
Tom.

Tom,
Check this?
declare @tab table(id int identity,salesperson varchar(100),quarter int,sales int)
insert @tab(salesperson,quarter,sales) select 'jk',1,100
insert @tab(salesperson,quarter,sales) select 'jk',2,300
insert @tab(salesperson,quarter,sales) select 'jk',3,200
insert @tab(salesperson,quarter,sales) select 'jk',4,50
insert @tab(salesperson,quarter,sales) select 'jay',1,505
insert @tab(salesperson,quarter,sales) select 'jay',2,0
insert @tab(salesperson,quarter,sales) select 'jay',3,505
insert @tab(salesperson,quarter,sales) select 'jay',4,244
;with cte
as
select id,salesperson,quarter,sales,row_number() over(partition by salesperson order by sales desc) rn
from @tab
select id,salesperson,quarter,sales
from cte
where rn=1
The above will generate only one row in case of 'jay' record even though he has TWO quarters with the highest value. If you need both rows to be generated, then use DENSE_RANK() in place of ROW_NUMBER aggregate function as below:
declare @tab table(id int identity,salesperson varchar(100),quarter int,sales int)
insert @tab(salesperson,quarter,sales) select 'jk',1,100
insert @tab(salesperson,quarter,sales) select 'jk',2,300
insert @tab(salesperson,quarter,sales) select 'jk',3,200
insert @tab(salesperson,quarter,sales) select 'jk',4,50
insert @tab(salesperson,quarter,sales) select 'jay',1,505
insert @tab(salesperson,quarter,sales) select 'jay',2,0
insert @tab(salesperson,quarter,sales) select 'jay',3,505
insert @tab(salesperson,quarter,sales) select 'jay',4,244
;with cte
as
select id,salesperson,quarter,sales,dense_rank() over(partition by salesperson order by sales desc) rn
from @tab
select id,salesperson,quarter,sales
from cte
where rn=1
Thanks,
Jay
<If the post was helpful mark as 'Helpful' and if the post answered your query, mark as 'Answered'>
Yep
thats true
you can use RANK also instead of DENSE RANK as in this case you're looking for the highest
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

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Hi,
998478 wrote:
... If we mix aggregate and non-aggregate values then there must be a GROUP BY clause containing all the non-aggregate values. Why is this not handled by the database/compiler itself? It IS handled by the compiler itself. The compiler handles it by raising an error. The compiler has no way of knowing whether you want to remove something from the SELECT clause, or to add something to the GROUP BY clause, or not to use aggregate functions, or to use more aggregate functions, or some combination of the above. If the compiler re-wrote your code, and did any of these things automatically, it would be wrong more often than it was right, and you would (rightly) be complaining about its behavior.
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SELECT    deptno
,       job
,       SUM (sal)
FROM       scott.emp
GROUP BY deptno
;What is the right way to fix it?
<h3>1. Remove something from the SELECT clause</h3>
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,       SUM (sal)
FROM       scott.emp
GROUP BY deptno
;<h3>2. Add something to the GROUP BY clause</h3>
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,       job
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FROM       scott.emp
GROUP BY deptno
,         job
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,       job
,       sal
FROM       scott.emp
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FROM       scott.emp
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How can anybody say which of these is right? All of them are the right answer for some problem.
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I a have a problem:
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