Introduction to SQL The SQL keyword GROUP BY instructs the DBMS to group together those rows that have the same value in a column. True False True False 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 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 All of these 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 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 All of these 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 ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Which of the following is valid SQL for an Index? CREATE INDEX ID; REMOVE INDEX ID; ADD INDEX ID; CHANGE INDEX ID; CREATE INDEX ID; REMOVE INDEX ID; ADD INDEX ID; CHANGE INDEX ID; ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The SQL keyword BETWEEN is used: as a wildcard. None of these for ranges. to limit the columns displayed. as a wildcard. None of these for ranges. to limit the columns displayed. ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL When three or more AND and OR conditions are combined, it is easier to use the SQL keyword(s): Both IN and NOT IN. IN only. NOT IN only. LIKE only. Both IN and NOT IN. IN only. NOT IN only. LIKE only. ANSWER DOWNLOAD EXAMIANS APP
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