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getting other data after using LIMIT?

I have a table with a few hundreds records of products information. I
need to retrieve the top 10 records based on the sum of the products
quantity. My query is as below:

Select *, sum(qty) as SUMQTY ,sum(amount) as SUMAMOUNT from tdetail
group by barcode order by SUMQTY desc limit 10;

This query gave me 10 records of products(barcod e). My problem is that
i need to have another 2 fields for the percentage calculation(
eg.sum(qty) of product N/total qty , sum(amount)of product N/total
amount.), but i dont know how to get the total qty and total amount.
How do i do that in one query?

Any help would be appreciated.
Jul 19 '05 #1
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