Introduction to SQL
SQL can be used to:

query database data only.
modify database data only.
create database structures only.
All of these

ANSWER DOWNLOAD EXAMIANS APP

Introduction to SQL
Find all the tuples having temperature greater than 'Paris'.

SELECT * FROM weather WHERE temperature > (SELECT temperature FROM weather WHERE city = 'Paris')
SELECT * FROM weather WHERE temperature > 'Paris' temperature
SELECT * FROM weather WHERE temperature > (SELECT city FROM weather WHERE city = 'Paris')
SELECT * FROM weather WHERE temperature > (SELECT * FROM weather WHERE city = 'Paris')

ANSWER DOWNLOAD EXAMIANS APP

Introduction to SQL
Which of the following query finds the total rating of the sailors who have reserved boat "103"?

c) SELECT COUNT(s.rating) FROM sailors s, reserves r WHERE s.sid = r.sid AND r.bid = 103
SELECT SUM(s.rating) FROM sailors s, reserves r AND r.bid = 103;
SELECT s.rating FROM sailors s, reserves r WHERE s.sid = r.sid AND r.bid = 103
SELECT SUM(s.rating) FROM sailors s, reserves r WHERE s.sid = r.sid AND r.bid = 103

ANSWER DOWNLOAD EXAMIANS APP