Group by order by in same query

Question

Hi,
I am wondering whether it is possible to use group by and order by in same query
For example if i have a table like the one below
Col1 Col2 col3
C 36 2
A 25 5
B 12 8
A 25 6
B 12 9
C 36 1
A 25 7
I need a result like below
A 25 5
A 25 6
A 25 7
B 12 8
B 12 9
C 36 1
C 36 2
can the select statement with group by and order by solve this? How?

Answer 1

Yes you can - though I am not sure that it is what you want. In your example you do not need to group the data, you just need to order by the first column, then the third. If required, you could also throw in the second column;
SQL> with t as  ( 
   select 'C' col1, 36 col2, 2 col3 from dual union all 
   select 'A', 25 ,5 from dual union all 
   select 'B', 12 ,8 from dual union all 
   select 'A', 25 ,6 from dual union all 
   select 'B', 12 ,9 from dual union all 
   select 'C', 36 ,1 from dual union all   
   select 'A', 25 ,7 from dual)  
select col1,col2,col3  
from t
order by col1,col3
COL1       COL2       COL3
A            25          5
A            25          6
A            25          7
B            12          8
B            12          9
C            36          1
C            36          2