Q27

Consider the following relation:

\overset{\text{Student}}{\begin{array}{|c|c|}\hline\\ \underline{\textbf{Roll_No}}& \textbf{Student_Name}\\\hline 1& \text{Raj} \\ \hline 2& \text{Rohit}\\ \hline 3& \text{Raj} \\\hline \end{array}} \qquad\overset{\text{Performance}}{\begin{array}{|c|l|r|c|}\hline\\ \underline{\textbf{Roll_No}}& \underline{\textbf{Course}}& \textbf{Marks} \\\hline 1& \text{Math}& 80 \\ \hline 1& \text{English}& 70 \\ \hline 2& \text{Math}& 75 \\\hline 3& \text{English}& 80 \\\hline 2& \text{Physics}& 65 \\\hline 3& \text{Math}& 80 \\\hline \end{array}}

Consider the following SQL query. SELECT S.Student_Name, Sum(P. Marks) FROM Student S, Performance P WHERE S.Roll_No= P.Roll_No GROUP BY S.STUDENT_Name The numbers of rows that will be returned by the SQL query is_________________.