Structured Query Language · Database Management System and Warehousing · GATE Data Science and Artificial Intelligence

$$ \text { On a relation named Loan of a bank: } $$

The following SQL query is executed

SELECT L1.loan_number

FROM Loan L1

WHERE L1.amount > (SELECT MAX

(L2.amount)

FROM Loan L2

WHERE L2.branch_name $=$ 'SR Nagar');

The number of rows returned by the query is _________

Consider a fact table in an OLAP application: Facts (D1, D2, val), where D1 and D2 are its dimension attributes and val is a dependent attribute. Suppose

attribute D1 takes 3 values and D2 takes 2 values, and all combinations of these values are present in the table Facts. How many tuples are there in the result of the following query?

SELECT D1, D2, sum(val)

FROM Facts

GROUP BY CUBE (D1, D2);