Introduction to SQL Which of the following command makes the updates performed by the transaction permanent in the database? DELETE COMMIT ROLLBACK TRUNCATE DELETE COMMIT ROLLBACK TRUNCATE ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL ON UPDATE CASCADE ensures which of the following? Materialized Views Normalization Data Integrity All of these Materialized Views Normalization Data Integrity All of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL DISTINCT and its counterpart, ALL, can be used more than once in a SELECT statement. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Find the name of all cities with their temperature, humidity and countries. SELECT weather.city, temperature, humidity FROM weather SELECT country FROM location WHERE weather.city = location.city; SELECT weather.city, temperature, humidity, country FROM weather, location WHERE weather.city = location.city; SELECT weather.city, temperature, humidity, country FROM weather, location; SELECT city, temperature, humidity, country FROM location; SELECT weather.city, temperature, humidity FROM weather SELECT country FROM location WHERE weather.city = location.city; SELECT weather.city, temperature, humidity, country FROM weather, location WHERE weather.city = location.city; SELECT weather.city, temperature, humidity, country FROM weather, location; SELECT city, temperature, humidity, country FROM location; ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The condition in a WHERE clause can refer to only one value. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Which of the following query finds the name of the sailors who have reserved at least two boats? SELECT DISTINCT s.sname FROM sailors s, reserves r1, reserves r2 WHERE s.sid = r1.sid AND r1.sid = r2.sid AND r1.bid ≠ r2.bid SELECT DISTINCT s.sname FROM sailors s, reserves r1, reserves r2 WHERE s.sid = r1.sid AND r1.sid = r2.sid AND r1.bid <> r2.bid All of these SELECT DISTINCT s.sname FROM sailors s, reserves r1, reserves r2 WHERE s.sid = r1.sid AND COUNT(r1.bid) > r2.bid SELECT DISTINCT s.sname FROM sailors s, reserves r1, reserves r2 WHERE s.sid = r1.sid AND r1.sid = r2.sid AND r1.bid ≠ r2.bid SELECT DISTINCT s.sname FROM sailors s, reserves r1, reserves r2 WHERE s.sid = r1.sid AND r1.sid = r2.sid AND r1.bid <> r2.bid All of these SELECT DISTINCT s.sname FROM sailors s, reserves r1, reserves r2 WHERE s.sid = r1.sid AND COUNT(r1.bid) > r2.bid ANSWER DOWNLOAD EXAMIANS APP
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