How to Combine Multiple Physical Queries

Question

Hi All,
I have a big reports with over 70-80 columns in Answer. This is not a Pivot report. Now it is generating 3 physical queries .
I need to merge this 3 queries into a single query. But it seems very hard to implement.
Couple of points:
1. Report is generating 3 physical queries. All queries are GROUP BY queries and each of them giving different count separately
2. If we find a way to combine. The result would be different from Answers Report Result (This is my assumption)
3. How Answer is combining the results from 3 queries and showing us the result?
Any input or thought is high appreciated.
I'm totally stuck in there. Tried different ways. But is there any solution for this that I'm not able to think?
Pls Help
Thanks in Advance
Regards
Sudipta

Answer 1

Hi Kranthi,
Thanks for you reply.
I need to combine multiple report queries into one and give it to ETL guys. I don't have to do anything in Answers. This is my requirement.
I'm good in SQL. So I tried to combine like the following. Taking a small scenario.
In this case, Anlytics is generating following 2 queries:
Query 1:
select sum(x), [Fact column]
sum(y), [Fact column]
column1, [Dim column]
column2, [Dim column]
column3, [Dim column]
from table1,table2,table3
where [All joins]
group by column1,column2,column3
Query 2:
select sum(z), [Fact column]
column1, [Dim column]
column2, [Dim column]
column3, [Dim column]
from table1,table2,table3
where [All joins]
group by column1,column2,column3
I'm trying to combine it:
Query 1:
select sum(x), [Fact column]
sum(y), [Fact column]
sum(z), [Fact column]
column1, [Dim column]
column2, [Dim column]
column3, [Dim column]
from
(select sum(x), [Fact column]
sum(y), [Fact column]
column1, [Dim column]
column2, [Dim column]
column3, [Dim column]
from table1,table2,table3
where [All joins]
group by column1,column2,column3
) q1,
select sum(z), [Fact column]
column1, [Dim column]
column2, [Dim column]
column3, [Dim column]
from table1,table2,table3
where [All joins]
group by column1,column2,column3
) q2
where
q1.column1=q2.column1 and
q1.column2=q2.column2 and
q1.column3=q2.column3
But i think it is not the correct way may be, as i'm getting a bit different count. So the where conditions are not matching for the 2 queries above.
Any thought on this?
Thanks
Sudipta