Sql sum question

Question

I need to produce a CF report only showing the top five
suppliers, plus other information.
I count each supplier, with group by, then sum the count,
with group by, to get the total occurrances of each supplier. My
query/subquery is something like this :
select sum(supplierCount) as totalCount, supplier
from
select count(supplier) as suppliercount, supplier
from table
group by supplier
) as a
group by supplier
order by supplier
This appears to work and gives me the total occurrances of
each supplier. I can then select the top 5. Howver, when I start
including the other columns, the count/sum does not seem to work
anymore and becomes 1 for each supplier. I even tried usign QofQ
and that did not work.
How can I write the query to give me the total number of
occurrances of each supplier, in addition to having the other
columns on the report ?

Answer 1

if you were using mysql as your db, your current query would
have worked
just fine with any other columns you added - mysql does not
require the
query to be grouped by ALL non-aggregate columns, one is
enough.
in your case, i think you will need to have 2 queries and
then combine
then with a QoQ.
something like (untested):
<!--- get top 5 suppliers with unique supplier id --->
<cfquery name="top5suppliers" ...>
SELECT TOP 5 COUNT(supplier_id) AS supplierCount, supplier_id
FROM table
GROUP BY supplier_id
ORDER BY COUNT(supplier_id) DESC
</cfquery>
<!--- store top 5 supplier ids in a list --->
<cfset supplier_id_list =
valuelist(top5suppliers.supplier_id)>
<!--- get all other data for top 5 suppliers --->
<cfquery name="top5suppliersData" ...>
SELECT supplier_id, ....
FROM suppliers_table
WHERE supplier_id IN (#supplier_id_list#)
</cfquery>
<!--- combine data using QoQ --->
<cfquery name="suppliersFullData" dbtype="query">
SELECT top5suppliers.supplierCount, top5suppliersData.*
FROM top5suppliers, top5suppliersData
WHERE top5suppliers.supplier_id =
top5suppliersData.supplier_id
ORDER BY supplierCount DESC
</cfquery>
Azadi Saryev
Sabai-dee.com
http://www.sabai-dee.com/