sql server - SQL: Select Top 3 Records + Sum of Quantity -


i display top 3 records existing orders table. in order accomplish this, need calculate sum of each product's quantity.

existing records:

orderno     productid     quantity 1           1             50 1           2             30 1           3             20 2           2             30 3           1             100 3           4             50 4           1             20 4           5             10 5           2             10

expected output

productid     quantity 1             170 2             70 4             50

you need sum , order by summary value:

select top 3 productid, sum(quantity) qsum table group productid order qsum desc

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