Question: Consider the relational database above. How many rows will be returned by the following SQL query? SELECT S . Sname, sum ( P . Marks

Consider the relational database above. How many rows will be returned by the following SQL query?
SELECT S.Sname, sum(P.Marks)
FROM Students S, Performance P
WHERE S.sid = P.sid
GROUP BY S. Sname
The query basically joins the two tables on sid, then groups records by Sname, and then sums up the Marks for each group.
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Consider the relational database above. How many rows will be returned

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