From the previous assignment, we have an Entity Relationship diagram (ERD or ER Diagram).

Transcription

1 Sports Active ER to Relational Database & SQL Queries ER Diagram From the previous assignment, we have an Entity Relationship diagram (ERD or ER Diagram). However, it has been made obvious that there are some changes that are required. Some of these are a simple re-wording, however there is the addition of a new entity. This is required to make the design work. Cormac O'Connell Page 1 of 12 5/14/2007

2 As you can see, we have a new entity Event. This is due to the requirement to support more than one event at a meeting. This we could then convert to a database. Cormac O'Connell Page 2 of 12 5/14/2007

3 The Sports Active Database Once we have ascertained what information we needed to include in the database, we could then start working on the tables and the relationships between these tables. For the database that I wrote, I came up with the following tables: Athlete Discipline Event TimeKeeper Venue Once these tables had been created, I then started to populate them with some data. 1. Athlete athleteid Text Yes Primary Key firstname Text Yes First Name lastname Text Yes Last Name Title Text Yes Salutation: Mr, Mrs, Miss, Dr, Prof etc Gender Text Yes Male / Female dateofbirth Date/Time Yes Date of Birth address1 Text Yes First Line of the Address address2 Text No Second Line of the Address Town Text Yes Town Name County Text Yes County Name Postcode Text Yes Postcode homephone Text No Home Telephone Number workphone Text No Work Telephone Number mobilephone Text No Mobile Phone Number Fax Text No Fax Number Text No Address disclosureconsent Yes/No No Agreement to disclose personal data in a membership list Subscribed Yes/No No Is the Subscription Paid? crosscountry Yes/No No Cross Country Discipline fellandhill Yes/No No Fell & Hill running Discipline racewalking Yes/No No Race Walking Discipline roadrunning Yes/No No Road Running Discipline trackandfield Yes/No No Track & Field Discipline Cormac O'Connell Page 3 of 12 5/14/2007

4 2. Discipline discipline Text Yes List of Disciplines 3. Event eventid Text Yes Unique ID number for the event venueid Text No Linked from table Venue eventdate Date/Time No Date of the event Discipline Text No Linked from table Discipline timekeeperid Text No Linked from TimeKeeper 4. TimeKeeper timekeeperid Text Yes Unique ID number for the Time Keeper timekeeperfirstname Text Yes First Name timekeeperlastname Text Yes Last Name 5. Venue venueid Text Yes Unique ID number for the venue venuename Text Yes Name of the venue venueaddress Text Yes Address of the Venue supportcrosscountry Yes/No No Support Cross Country supportfellandhill Yes/No No Support Fell and Hill supportracewalking Yes/No No Support Race Walking supportroadrunning Yes/No No Support Road Running supporttrackandfield Yes/No No Support Track And Field While trying to link the tables together in a relationship it became apparent that this would not work in their current state. I had to add a couple of tables to get the relationships to work. 6. AthleteParticipation athleteid Text Yes Linked from table Athlete eventid Text Yes Linked from table Athlete Cormac O'Connell Page 4 of 12 5/14/2007

5 7. VenueAvailability crosscountrydates Date/Time No Cross Country Dates Available fellandhilldates Date/Time No Fell and Hill Dates Available racewalkingdates Date/Time No Race Walking Dates Available roadrunningdates Date/Time No Road Running Dates Available trackandfielddates Date/Time No Track and Field Dates Available These tables were now in a better state to be linked into a relationship. The following is a screenshot of the relationship. Cormac O'Connell Page 5 of 12 5/14/2007

6 The Data Values The following is a copy of the test data that was input into the system Athlete athlet eid firstn ame lastn ame titl e gen der dateof Birth addre ss1 addre ss2 town cou nty postc ode homep hone workph one mobilep hone fa x disclosurec onsent subscri bed crossco untry fellan dhill racewal king roadrun ning trackand Field A001 Corma c O'Con nell Mr Male 25/04/ High St Sutton Cam bs CB6 2RB cjo24@cam.ac.uk Yes Yes Yes No Yes No Yes A002 John Smith Mr Male 31/10/1 33 The 976 Elms Chatter is Cam bs PE3 7EH Yes No No Yes No Yes No A003 Steph Riach Mi ss Fem ale 29/06/ Nurser y Walk Cambri dge Cam bs CB4 8KD No Yes Yes Yes Yes No No A004 Jenny Challi s Mi ss Fem ale 26/05/ Cambri dge Road Newm arket Suff olk IP2 8JL No No No No No Yes Yes A005 Keith Garret t Mr Male 26/08/ Nurser y Walk Cambri dge Cam bs CB4 8KD Yes Yes Yes Yes Yes Yes Yes AthleteParticipation athleteid eventid A001 e001 A001 e004 A002 e002 A002 e003 A003 e001 A003 e005 A003 e006 A004 e003 A004 e004 Cormac O'Connell Page 6 of 12 5/14/2007

7 Discipline discipline Cross Country Fell And Hill Race Walking Road Running Track And Field Event eventid venueid eventdate discipline timekeeperid e001 v002 20/05/2007 Cross Country t01 e002 v003 20/05/2007 Fell And Hill t02 e003 v001 21/05/2007 Road Running t03 e004 v001 21/05/2007 Track And Field t04 e005 v004 21/05/2007 Race Walking t01 e006 v004 22/05/2007 Fell And Hill t02 e007 v002 23/05/2007 Race Walking t00 TimeKeeper timekeeperid timekeeperfirstname timekeeperlastname t00 NULL NULL t01 Bob Flemming t02 John Smith t03 Richard Numb t04 Andrew Capp t05 Nobby No-Mates Cormac O'Connell Page 7 of 12 5/14/2007

8 Venue venueid venuename venueaddress supportcrosscountry supportfellandhill supportracewalking supportroadrunning supporttrackandfield v001 Chesterton Sports Centre Chesterton College No No Yes Yes Yes v002 Parkside East Road Yes No No No No v003 Paradise Sports Hall Ely Yes Yes No No Yes v004 The Ivo St Ives No Yes Yes Yes No Cormac O'Connell Page 8 of 12 5/14/2007

9 The SQL Queries Query1 AthleteNames SELECT firstname, lastname FROM Athlete ORDER BY lastname; Query1-AthleteNames firstname lastname Jenny Challis Keith Garrett Cormac O'Connell Steph Riach John Smith This query successfully extracts the data of the Athletes names and sorts them by last name order, but displays them in the sequence of first name, last name. If I wanted to display them in the sequence of last name, first name I would simply have to swap the line SELECT firstname, lastname for SELECT lastname, firstname. Query2-AthleteCrossCountry SELECT firstname, lastname, crosscountry FROM Athlete WHERE Athlete.crossCountry=True ORDER BY lastname; Query2-AthleteCrossCountry firstname lastname crosscountry Keith Garrett Yes Cormac O'Connell Yes Steph Riach Yes This query successfully extracted the data of those Athletes participating in the Cross Country events. To extract the data for other events, it is a simple matter of changing the entry crosscountry in the SELECT line to match that of the desired discipline. Cormac O'Connell Page 9 of 12 5/14/2007

10 Query3-TimeKeepers SELECT TimeKeeper.timeKeeperFirstName, TimeKeeper.timeKeeperLastName, Event.eventID FROM TimeKeeper INNER JOIN Event ON TimeKeeper.timeKeeperID=Event.timeKeeperID ORDER BY TimeKeeper.timeKeeperLastName; Query3-TimeKeepers timekeeperfirstname timekeeperlastname eventid Andrew Capp e004 Bob Flemming e005 Bob Flemming e001 NULL NULL e007 Richard Numb e003 John Smith e006 John Smith e002 This query successfully extracts the data to list all the time keepers and which events they are officiating. Query4-MenBetween20And25 SELECT COUNT(Athlete.athleteID) AS Men20and25 FROM Athlete WHERE Athlete.gender="Male" AND Athlete.dateOfBirth BETWEEN "01/01/1982" And "31/12/1987"; This query does not work. It returns Data type mismatch in criteria expression. Unfortunately I can not see where this error is being generated from. Query6-AthleteNotSubscribed SELECT Athlete.firstName, Athlete.lastName, Athlete.subscribed, Event.eventID, Event.eventDate FROM Event INNER JOIN (Athlete INNER JOIN AthleteParticipation ON Athlete.athleteID=AthleteParticipation.athleteID) ON Event.eventID=AthleteParticipation.eventID WHERE Athlete.subscribed=False; Query6-AthleteNotSubscribed firstname lastname subscribed eventid eventdate John Smith No e002 20/05/2007 John Smith No e003 21/05/2007 Jenny Challis No e003 21/05/2007 Jenny Challis No e004 21/05/2007 This query extracts the data for all Athletes that have not been listed as having paid their subscription fees and all the events that they are participating in. Cormac O'Connell Page 10 of 12 5/14/2007

11 Query7-AthletesOnlyParticipatingInEvent SELECT DISTINCT Athlete.firstName, Athlete.lastName FROM Athlete INNER JOIN AthleteParticipation ON Athlete.athleteID=AthleteParticipation.athleteID WHERE Athlete.athleteID=AthleteParticipation.athleteID ORDER BY Athlete.lastName; Query7-AthletesOnlyParticipatingInEvent firstname lastname Jenny Challis Cormac O'Connell Steph Riach John Smith This query successfully extracts the data of all the athletes that are participating in an event. Query8-MeetingWithoutTimeKeeper SELECT Event.eventID, Event.venueID, Event.eventDate, Event.discipline, Event.timeKeeperID FROM Event WHERE Event.timeKeeperID="t00"; Query8-MeetingWithoutTimeKeeper eventid venueid eventdate discipline timekeeperid e007 v002 23/05/2007 Race Walking t00 Although this query worked, I feel it was through a roundabout way of cheating. As I had specified in one of the tables that the Time Keeper field was a required field, this meant that I had no means of having a blank. As a work around for this I created an entry in the Time Keeper table for an entry NULL. This meant I could meet the Required requirements and still maintain a meeting that had not yet been set up with a Time Keeper. Cormac O'Connell Page 11 of 12 5/14/2007

12 References and Acknowledgments General reference was made to the following when seeking assistance for this assignment: Software System Development, 4 th Edition, Britton & Doake, McGraw Hill Publishing. Direct reference was made to the corrections on the previous assignment Entity Attribute Relationship Model and the corrections made there by Elaine Brown. I would also like to take this opportunity to note that the idea for the table AthleteParticipation was not my original idea, although the implementation was mine. William Saltmarsh made the suggestion to add a table to fix the problems I was experiencing when trying to link table Athlete to table Event. Cormac O'Connell Page 12 of 12 5/14/2007