You are not logged in.

#1 2015-09-18 06:26:43

husnain
User RankUser RankUser RankUser RankUser RankUser Rank
Administrator
From: Chichawatni,Pakistan
Registered: 2014-10-03
Posts: 8,129
Website

SQL Reserved:

Database Quizzes SQL

Question:
Which of the following query finds the name of the sailors who have reserved at least two boats?

Option A):
SELECT DISTINCT s.sname FROM sailors s, reserves r1, reserves r2 WHERE s.sid = r1.sid AND COUNT(r1.bid) > r2.bid
Option B):
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
Option C):
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

Correct Answer is Option C):
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


You cannot discover the new oceans unless you have the courage to lose the sight of the shore.

2015-09-18 06:26:43

Advertisement
Ads By Google

Re: SQL Reserved:



Board footer