group and order with union

Question

I'm trying to join these two queries and I don't know why it doesn't work.

(select coluna1, coluna2, coluna3, coluna4,coluna5 as produto, sum(coluna6) coluna6, min(coluna7) as coluna7, max(coluna8) as coluna8, coluna9, coluna10
from view
where coluna5 in ('prod1',
'prod2',
'prod3')

and coluna1 is not null
group by coluna1, coluna2, coluna3, coluna4,coluna5, coluna9, coluna10
order by coluna1, coluna2, coluna4,coluna5, min(coluna7))

UNION

(select coluna1, coluna2, coluna3, coluna4,coluna5 as produto, max(coluna6) coluna6, min(coluna7nova) as coluna7, max(coluna8nova) as coluna8, coluna9, coluna10
from view
where coluna5 in ('prod4',
'prod5',
'prod6')
and coluna1 is not null
group by coluna1, coluna2, coluna3, coluna4,coluna5, coluna9, coluna10
order by coluna1, coluna2, coluna4,coluna5, min(coluna7nova))

Answer 1

Next time you ask a question do not only say "does not work", but explain what you mean by that. Particularly, include any error message you get.

As it happens, I can see the error directly this time. In an UNION query, the ORDER BY clause applies to the full UNION query; you cannot have ORDER BY clauses for each query. This might be query you want:

select coluna1, coluna2, coluna3, coluna4,coluna5 as produto, sum(coluna6) coluna6, min(coluna7) as coluna7, max(coluna8) as coluna8, coluna9, coluna10
from view
where coluna5 in ('prod1',
'prod2',
'prod3')
and coluna1 is not null
group by coluna1, coluna2, coluna3, coluna4,coluna5, coluna9, coluna10
UNION ALL
select coluna1, coluna2, coluna3, coluna4,coluna5 as produto, max(coluna6) coluna6, min(coluna7nova) as coluna7, max(coluna8nova) as coluna8, coluna9, coluna10
from view
where coluna5 in ('prod4',
'prod5',
'prod6')
and coluna1 is not null
group by coluna1, coluna2, coluna3, coluna4,coluna5, coluna9, coluna10
order by coluna1, coluna2, coluna4,coluna5, coluna7

I changed UNION to UNION ALL, because that is what want most of the time. UNION remove duplicates which takes resources. And you may want to retain the duplicates.

Answer 2

Hi @Barbara ，

Welcome to the microsoft tsql Q&A forum!

Or:

;With cte  
as(select coluna1, coluna2, coluna3,   
coluna4,coluna5 as produto,   
sum(coluna6) coluna6, min(coluna7) as coluna7,  
max(coluna8) as coluna8, coluna9, coluna10  
from view  
where coluna5 in ('prod1','prod2','prod3')  
and coluna1 is not null  
group by coluna1, coluna2, coluna3, coluna4,coluna5, coluna9, coluna10  
UNION  
select coluna1, coluna2, coluna3,  
coluna4,coluna5 as produto,   
max(coluna6) coluna6, min(coluna7nova) as coluna7,  
max(coluna8nova) as coluna8, coluna9, coluna10  
from view  
where coluna5 in ('prod4','prod5','prod6')  
and coluna1 is not null  
group by coluna1, coluna2, coluna3, coluna4,coluna5, coluna9, coluna10)  
  
select * from cte  
order by coluna1, coluna2, coluna4,coluna5,coluna7  

For details, please refer to:
Using UNION of two SELECT statements with ORDER BY

If you have any question, please feel free to let me know.

Regards
Echo

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