By De Wen Zhong
This database holds data about the teams that are involved in the AFL
There are eight tables altogether each holding data about various things
related to each team.
There is a table that contains data on each of the teams such as when
they joined the league and how many premierships they have won in the
past.
 Has information about players and what teams they play for at the
moment as well as the team they may have transferred from.
Has coach information such as who they coach and what type of coach
they are (Head or Assistant).
Information in each team’s home grounds in which they play at such as
the capacity and location.
Also has information on what the team colours are for each team.
Colours
ColourID
ColourName
TeamPlayer
TeamName*
PlayerID*
PastClubs*
TeamColours
TeamName*
ColourID*
Teams
TeamName
TeamStart
TeamPremierships
TeamMascot
VenueDetails
VenueID
VenueName
Location
Capacity
TeamVenue
TeamName*
VenueID*
PlayerDetails
PlayerID
PlayerLastName
PlayerFirstName
Debut
DOB
CoachDetails
CoachID
TeamName*
CoachLastName
CoachFirstName
CoachType
FirstYear
CoachPremierships
One team can have many coaches
coachlastname |
teamname
---------------+----------------------Clarkson
| Hawthorn
Connelly
| Fremantle
Craig
| Adelaide
Daniher
| Melbourne
Eade
| Footscray
Laidley
| North Melbourne
Lyon
| St Kilda
Malthouse
| Collingwood
Matthews
| Brisbane/Fitzroy
Pagan
| Carlton
Roos
| Sydney/South Melbourne
Sheedy
| Essendon
Thompson
| Geelong
Wallace
| Richmond
Williams
| Port Adelaide
Worsfold
| West Coast
Longmire
| Sydney/South Melbourne
Blakey
| Sydney/South Melbourne
Berbakov
| Sydney/South Melbourne
Allison
| Sydney/South Melbourne
(20 rows)
Primary key
Teams
TeamName
TeamStart
TeamPremierships
TeamMascot
Foreign Key
CoachDetails
CoachID
TeamName*
CoachLastName
CoachFirstName
CoachType
FirstYear
CoachPremierships
One team can have many colours while many teams can share one colour
Primary Key
Colours
ColourID
ColourName
Foriegn Key
Foriegn Key
TeamColours
TeamName*
ColourID*
Primary Key
Teams
TeamName
TeamStart
TeamPremierships
TeamMascot
One team can have many colours while many teams can share one colour
Teams
ColourID comes
from Colours
table
teamname
| other columns
------------------------+--------------Adelaide
|
...
Brisbane/Fitzroy
|
...
Carlton
|
...
Collingwood
|
...
TeamColours
Essendon
|
...
teamname
| colourid
Fremantle
|
...
------------------------+---------Geelong
|
...
Adelaide
|
1
...
|
...
Adelaide
|
7
(16 rows)
Adelaide
|
9
Brisbane/Fitzroy
|
9
Brisbane/Fitzroy
|
5
Carlton
|
10
Carlton
|
6
TeamName comes
Collingwood
|
1
Collingwood
|
10
from Teams table
...
|
...
(39 rows)
Colours
colourid | colourname
----------+-----------1 | Black
2 | Blue
3 | Brown
4 | Green
5 | Maroon
6 | Navy Blue
7 | Red
8 | Teal
9 | Yellow
10 | White
(10 rows)
Show all the teams that have won more than 2 premierships
SELECT teamname, teamstart, teampremierships
FROM teams
WHERE teampremierships >2;
teamname
| teamstart | teampremierships
------------------------+-----------+-----------------Brisbane/Fitzroy
|
1983 |
11
Carlton
|
1897 |
16
Collingwood
|
1897 |
14
Essendon
|
1897 |
16
Geelong
|
1859 |
6
Hawthorn
|
1873 |
9
North Melbourne
|
1869 |
4
Melbourne
|
1856 |
12
Richmond
|
1908 |
10
Sydney/South Melbourne |
1897 |
4
West Coast
|
1987 |
3
(11 rows)
Show the coaches who are coaching Sydney/South Melbourne
SELECT teamname, coachlastname, coachfirstname, coachtype
FROM teams NATURAL JOIN coachdetails
WHERE teamname = ‘Sydney/South Melbourne’;
teamname
| coachlastname | coachfirstname |
coachtype
------------------------+---------------+----------------+----------------Sydney/South Melbourne | Roos
| Paul
| Head Coach
Sydney/South Melbourne | Longmire
| John
| Assistant Coach
Sydney/South Melbourne | Blakey
| John
| Assistant Coach
Sydney/South Melbourne | Berbakov
| Peter
| Assistant Coach
Sydney/South Melbourne | Allison
| Brett
| Assistant Coach
(5 rows)
Show which coach is coaching which team
SELECT teams.teamname, coachlastname, coachfirstname, coachtype
FROM teams, coachdetails
WHERE teams.teamname = coachdetails.teamname AND
teams.teamname = ‘Sydney/South Melbourne’;
teamname
| coachlastname | coachfirstname |
coachtype
------------------------+---------------+----------------+----------------Sydney/South Melbourne | Roos
| Paul
| Head Coach
Sydney/South Melbourne | Longmire
| John
| Assistant Coach
Sydney/South Melbourne | Blakey
| John
| Assistant Coach
Sydney/South Melbourne | Berbakov
| Peter
| Assistant Coach
Sydney/South Melbourne | Allison
| Brett
| Assistant Coach
(5 rows)
Show the amount of home grounds a team has given they have more than 1
SELECT teamname, count(*) as amount
FROM teamvenue
GROUP BY teamname HAVING count(*) >1;
teamname
| amount
------------------------+------Footscray
|
4
Essendon
|
2
Collingwood
|
2
Hawthorn
|
2
Sydney/South Melbourne |
2
North Melbourne
|
3
Richmond
|
2
Carlton
|
2
Melbourne
|
3
(9 rows)
Find the players who have played in the same previous club as ‘Barry
Hall’
SELECT playerfirstname, playerlastname, pastclubs
FROM teamplayer NATURAL JOIN playerdetails
WHERE pastclubs = (
SELECT pastclubs
FROM teamplayer NATURAL JOIN playerdetails
WHERE playerfirstname = ‘Barry’ AND playerlastname = ‘Hall’;
playerlastname | playerfirstname
----------------+----------------Everitt
| Peter
Hall
| Barry
(2 rows)
Find the players who have played in the same previous club as ‘Barry
Hall’
SELECT p1.playerfirstname, p1.playerlastname, t1.pastclubs
FROM teamplayer t1, teamplayer t2 , playerdetails p1, playerdetails p2
WHERE
p2.playerfirstname = ‘Barry’ AND
p2.playerlastname = ‘Hall’ AND
t1.playerno = p1.playerno AND
t2.playerno = p2.playerno AND
t1.pastclubs = t2.pastclubs;
playerlastname | playerfirstname
----------------+----------------Everitt
| Peter
Hall
| Barry
(2 rows)
CHECK statements makes sure the user does not enter in invalid data
To check for a valid year for a team to join the league
CONSTRAINT TeamStart CHECK(TeamStart >= 1856)
Check for a valid capacity for a venue (more then 10 000 people but less
than 200 000 people)
CONSTRAINT Capacity CHECK((Capacity > 10000) AND (Capacity <
200000))
Check for a valid debut year for a player (after 1970)
CONSTRAINT Debut CHECK(Debut >= 1970)
Check for a valid date of birth for a player (after 1950)
CONSTRAINT DOB CHECK(DOB >= 1950)
Check the coachtype will be either head coach or assistant coach
CONSTRAINT CoachType CHECK((CoachType = 'Head Coach') OR
(CoachType = 'Assistant Coach'))
Check the first year of the coach coaching is after 1950
CONSTRAINT FirstYear CHECK(FirstYear >= 1950)
Make sure to retain the integrity of the database
When one record is dependent an another, when the main record is
deleted, delete the dependent record as well
When one record is dependent an another, when the main record is being
changed, change the dependent record as well
CONSTRAINT TeamNameFK FOREIGN KEY (TeamName)
REFERENCEs Teams
ON DELETE CASCADE
ON UPDATE CASCADE,
Show all the venues that Footscray plays on as a home ground
CREATE VIEW footscrayvenues (venuename, location, capacity)
AS SELECT venuename, location, capacity
FROM teamvenue natural join venuedetails
WHERE teamname = 'Footscray';
venuename
| location | capacity
--------------------------+-----------+---------Melbourne Cricket Ground | Melbourne |
100000
Telstra Dome
| Melbourne |
56347
Manuka Oval
| Canberra |
15000
Marrara Oval
| Darwin
|
15000
(4 rows)
Show all the venues that Footscray plays on as a home ground that has a
capacity of over 50 000
SELECT * FROM footscrayvenues
WHERE capacity > 50000;
venuename
| location | capacity
--------------------------+-----------+---------Melbourne Cricket Ground | Melbourne |
100000
Telstra Dome
| Melbourne |
56347
(2 rows)