What is the result of this SQL query?

Posted by Martin on Stack Overflow See other posts from Stack Overflow or by Martin
Published on 2010-05-07T11:49:05Z Indexed on 2010/05/07 11:58 UTC
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I'm working on a mock exam paper at the moment, however I have no set of correct answers and I'm not sure what the correct answer of this SQL query is.

Given a table:

foo, bar
a  , 1
b  , 3
a  , 2
c  , 1

and the query:

SELECT foo, sum(bar)
FROM table
GROUP BY foo

The two ways I can see this going are either:

a 3
a 3
b 3
c 1

or

a 3
b 3
c 1

Thanks.

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