Chapter 9
minicases
Happy Cruise Lines
a. Find the start and
end dates of cruise
number 35218.
select startdate,
enddate
from cruise
where cruisenum =
35218;
9-2
startdate
enddate
٢٠٠٤/٥/١٥
٢٠٠٤/٥/٢٩
9-3
Happy Cruise Lines
b. List the names and
ship numbers of the
ships built by the Ace
Shipbuilding Corp.
that weigh more than
60,000 tons.
select shipnum,
shipname
from ship
where builder = 'Ace
Shipbuilding Corp.'
and weight > 60000;
9-4
shipnum
shipname
٠٢٢
Pacific Blue
9-5
Happy Cruise Lines

c. List the company’s that have built ships for
Happy Cruise Lines.
Select distinct builder
From ship;
9-6
Happy Cruise Lines

d. Find the total number of docks in all of the
ports in Canada.
Select sum(numdocks)
From port
Where country = ‘Canada’;
9-7
Happy Cruise Lines

e. Find the average weight of the ships built by
the Ace Shipbuilding Corp. that have been
launched since 2000.
Select avg(weight)
From ship
Where builder = ‘Ace Shipbuilding Corp.’ and
launchdate >= ‘JAN-01-2000’;
9-8
Happy Cruise Lines

f. How many ports in Venezuela have at least
three docks?
Select count(*)
From port
Where country = ‘Venezuela’ and numdocks >= 3;
9-9
Happy Cruise Lines

g. Find the total number of docks in each
country. List the results in order from most to
least.
Select country, sum(numdocks)
From port
Group by country
Order by sum(numdocks) DESC;
9-10
Happy Cruise Lines

h. Find the total number of ports in each country.
Select country, count(*)
From port
Group by country;
9-11
Happy Cruise Lines

i. Find the total number of docks in each country
but only include those countries that have at
least twelve docks in your answer.
Select country, sum(numdocks)
From port
Group by country
Having sum(numdocks) >= 12;
9-12
Happy Cruise Lines

j. Find the name of the ship that operated on
(was used on) cruise number 35218.
Select shipname
From ship, cruise
Where ship.shipnum = cruise.shipnum and
cruisenum = 35218;
9-13
Happy Cruise Lines

k. List the names, addresses, and telephone
numbers of the passengers who sailed on The
Spirit of Nashville on cruises that began during
July, 2003 .
Select passengername, address, phone
From passenger, voyage, cruise, ship
Where passenger.passengernum = voyage.passengernum
and voyage.cruisenum = cruise.cruisenum and
cruise.shipnum = ship.shipnum and shipname = ‘The
Spirit of Nashville’ and startdate between ‘JUL-01-2003’9-14
and ‘JUL-31-2003’;
Happy Cruise Lines

l. Find the names of the company’s heaviest
ships.
Select shipname
From ship
Where weight =
(select max(weight) from ship);
9-15
Happy Cruise Lines

m. Find the names of the company’s heaviest
ships that began a cruise between July 15, 2003
and July 31, 2003.
Select shipname
From ship, cruise
Where ship.shipnum = cruise.shipnum and startdate
between ‘JUL-15-2003’ and ‘JUL-31-2003’ and weight =
(select max(weight) from ship, cruise where ship.shipnum =
cruise.shipnum and startdate between ‘JUL-15-2003’
9-16
and ‘JUL-31-2003’);
Super Baseball League
a. Find the names and
cities of all of the
teams with team
numbers greater than
15. List the results
alphabetically by
team name.
select teamname, city
from team
where teamnum > 15
order by teamname;
9-17
teamname
city
Tigers
Detroit
Yankees
New York
9-18
Super Baseball
League
For MS Access:
b. List all of the coaches
whose last names
begin with “D” and
who have between 5
and 10 years of
experience as college
coaches (see
YEARSEXPERIENCE
and
EXPERIENCETYPE).
select coachname
from [work experience]
where coachname like
'D*'
and experiencetype =
'College Coach'
and yearsexperience
between 5 and 10;
9-19
teamnum
coachname
٢٤
Dooley
9-20
Super Baseball League

c. Find the total number of years of experience
of coach Taylor on team number 23.
Select sum(yearsexperience)
From [work experience]
Where teamnum = 23 and coachname = ‘Taylor’;
9-21
Super Baseball League

d. Find the number of different types of
experience that coach Taylor on team number
23 has.
Select count(*)
From [work experience]
Where teamnum = 23 and coachname = ‘Taylor’;
9-22
Super Baseball League

e. Find the total number of years of experience
of each coach on team number 23.
For MS Access:
Select sum(yearsexperience)
From [work experience]
Where teamnum = 23
Group by coachname;
9-23
Super Baseball League

f. How many different manufacturers make bats
for the league’s teams?
Select count(distinct manufacturer)
From bats;
9-24
MS Access 不支援 Select Count distinct 的語法，
要做這樣的查詢必須使用「子查詢」如下：
以 Cruise 資料庫為例，
要使用
Select count (country)
From
(Select distinct country from visit);
不能使用
Select count (distinct country)
from Visit;
9-25
Super Baseball League

g. Assume that team names are unique. Find the
names of the players who have played for the
Dodgers for at least five years (see YEARS in
the affiliation table.)
Select playername
From player, affiliation, team
Where player.playernum = affiliation.playernum and
affiliation.teamnum = team.teamnum and teamname =
‘Dodgers’ and years >= 5;
9-26
Super Baseball League

h. Assume that team names are unique. Find the
total number of years of work experience of each
coach on the Dodgers, but only include in the
result those coaches who have more than eight
years of experience.
Select coachname, sum(yearsexperience)
From team, [work experience]
Where team.teamnum = [work experience].teamnum and
teamname = ‘Dodgers’
Group by coachname
Having sum(yearsexperience) > 8;
9-27
Super Baseball League

i. Find the names of the league's youngest
players.
Select playername
From player
Where age =
(select min(age) from player);
9-28
Super Baseball League

j. Find the names of the league’s youngest
players whose last names begin with the letter
“B”.
Select playername
From player
Where playername like ‘B*’
And age =
(select min(age) from player where playername like ‘B*’);
9-29