Tricky sql query for popularity

Question

ProductId | BrandId | Views
    1         | 1       | 3
    2         | 1       | 2
    3         | 2       | 3
    4         | 2       | 4

Need write sql query to return this values:

BrandId | ViewsSummary
1       | 5
2       | 7

Please, how to do it?

Answer 1

It's hardly "tricky" - you're simply looking to group your results with an appropriate aggregate function :

SELECT BrandId, SUM(Views) AS ViewsSummary FROM my_table GROUP BY BrandId

See it on sqlfiddle .