3.2. National Computer Level 3 Database Examination—Backend Programming Technology

Test question one:

Question 2:

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Answer: [Reference answer]
(1) SELECT LOANS. Library card number, name, department name, COUNT( ) AS Number of borrowed books
FROM BORROWER, LOANS
WHERE BORROWER. Library card number = LOANS. Library card number
GROUP BY LOANS .Library card number
HAVING COUNT( )>=5;
(2) SELECT name, department name, book title, borrowing date
FROM BORROWER, LOANS, BOOKS
WHERE
BORROWER. Library card number = LOANS. Library card number AND LOANS .Library Registration Number=BOOKS.Book Registration Number
AND Call Number IN
(
SELECT Call Number FROM BORROWER,LOANS,BOOKS
WHERE BORROW.Library Card Number=LOANS.Library Card Number
AND LOANS.Library Registration Number=BOOKS.Books Registration number
AND name = "Wang Li"
)