CSCI Design of Database Systems, Fall 2016

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Louise Burns
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1 CSCI Design of Database Systems, Fall 2016 Suggested Solution for HW #6 (1) For example: (a) (b) (c) (d) )) π FName, LName, (Swimmer) π LevelId, StartDate (σ SwimmerId=2 (LevelHistory)) π FName, LName (σ MeetId=10 (Meet) x Coach) π EventId, Title,, FName, LName (Event x ρ CoachId/CoachId (σ SwimmerId=4 (Participation)) x Coach Note that it is necessary to rename CoachId before the natural join. If not, it becomes a Cartesian product. (e) π FName, LName (Swimmer x (σ EventId <> EventId_2 (π SwimmerId, EventId (Participation) x (ρ EventId_2/EventId (π SwimmerId, EventId(Participation)))))) (2) For example: DRC: (a) (b) (c) {(fname, lname, ) (_,fname,lname,_, ,_,_,_,_) ϵ Swimmer} {(levelid, startdate) (_,2,levelId,startDate,_) ϵ LevelHistory} {(lname,fname) (coachid,lname,fname,_,_) ϵ Coach, (10,_,_,_,_,_,coachId) ϵ Meet} (d) {(eventid, title, comment, fname, lname) (eventid, itle,_,_,_,_) ϵ Event, (_,4,eventId,_,,_,_,comment,coachId) ϵ Participation, (coachid,lname,fname,_,_) ϵ Coach (e) {(fname,lname) (sid,fname,lname,_,_,_,_,_,_) ϵ Swimmer, (_,sid,eventid_1,_,,_,_,_,_) ϵ participation, (_,sid,eventid_2,_,,_,_,_,_) ϵ participation, eventid_1 <> eventid_2} TRC: (a) {(s.fname, s.lname, s. ) s ϵ Swimmer} (b) {(l.levelid, l.startdate) l ϵ LevelHistory, l.swimmerid = 2} (c) {(c.fname, c.lname) c ϵ Coach, m ϵ Meet, m.coachid = c.coachid, m.meetid = 10} (d) {(e.eventid, e.title, p.comment, c.firstname, c.lastname) e ϵ Event, p ϵ Participation, c ϵ Coach, e.eventid = p.eventid, p.coachid = c.coachid, p.swimmerid = 4}

2 (e) {(s.fname, s.lname) s ϵ Swimmer, p1 ϵ Participation, p2 ϵ Participation, s.swimmerid = p1.swimmerid, s.swimmerid = p2.swimmerid, p1.eventid <> p2.eventid} (3) For example: -- Bare Bone DDL to create the CLYSTMS DB of -- HW #5 solution of CSCI Fall You may use the following DELETE TABLE -- to ensure starting with a clean slate. -- Note the DELETE TABLE is usually in the -- reverse order of CREATE TABLE to ensure -- no referential integrity violations. DROP TABLE IF EXISTS Commitment; DROP TABLE IF EXISTS V_Task; DROP TABLE IF EXISTS V_TaskList; DROP TABLE IF EXISTS Participation; DROP TABLE IF EXISTS Event; DROP TABLE IF EXISTS Meet; DROP TABLE IF EXISTS LevelHistory; DROP TABLE IF EXISTS OtherCaretaker; DROP TABLE IF EXISTS Swimmer; DROP TABLE IF EXISTS Venue; DROP TABLE IF EXISTS Level; DROP TABLE IF EXISTS Caretaker; DROP TABLE IF EXISTS Coach; -- Create tables DROP TABLE IF EXISTS Coach; CREATE TABLE Coach( CoachId INT UNSIGNED AUTO_INCREMENT, LName VARCHAR(30) NOT NULL, FName VARCHAR(30) NOT NULL, Phone VARCHAR(12) NOT NULL, VARCHAR(60) NOT NULL, CONSTRAINT Coach_pk PRIMARY KEY(CoachId) DROP TABLE IF EXISTS Caretaker; CREATE TABLE Caretaker( CT_Id INT UNSIGNED AUTO_INCREMENT, LName VARCHAR(30) NOT NULL, FName VARCHAR(30) NOT NULL, Phone VARCHAR(12) NOT NULL, VARCHAR(60) NOT NULL, CONSTRAINT Caretaker_pk PRIMARY KEY(CT_Id)

3 DROP TABLE IF EXISTS Level; CREATE TABLE Level( LevelId INT UNSIGNED, -- ok to use smaller INT such as TINYINT Level VARCHAR(30) NOT NULL, Description VARCHAR(250), CONSTRAINT level_pk PRIMARY KEY(LevelId), CONSTRAINT level_ck_1 UNIQUE(Level) DROP TABLE IF EXISTS Venue; CREATE TABLE Venue( VenueId INT UNSIGNED AUTO_INCREMENT, -- ok to use smaller INT such as SMALLINT Name VARCHAR(100) NOT NULL, Address VARCHAR(100) NOT NULL, City VARCHAR(50) NOT NULL, State VARCHAR(15) NOT NULL, ZipCode VARCHAR(10) NOT NULL, Phone VARCHAR(12) NOT NULL, CONSTRAINT venue_pk PRIMARY KEY(VenueId), CONSTRAINT venue_ck_1 UNIQUE(Name) DROP TABLE IF EXISTS Swimmer; CREATE TABLE Swimmer( SwimmerId INT UNSIGNED AUTO_INCREMENT, LName VARCHAR(30) NOT NULL, FName VARCHAR(30) NOT NULL, Phone VARCHAR(12) NOT NULL, VARCHAR(60) NOT NULL, JoinTime DATE NOT NULL, CurrentLevelId Main_CT_Id Main_CT_Since DATE NOT NULL, CONSTRAINT swimmer_pk PRIMARY KEY(SwimmerId), CONSTRAINT swimmer_level_fk FOREIGN KEY(CurrentLevelId) REFERENCES Level(LevelId), CONSTRAINT swimmer_caretaker_fk FOREIGN KEY(Main_CT_Id) REFERENCES Caretaker(CT_Id) DROP TABLE IF EXISTS OtherCaretaker; CREATE TABLE OtherCaretaker( OC_Id INT UNSIGNED AUTO_INCREMENT, SwimmerId CT_Id Since DATE NOT NULL,

4 CONSTRAINT othercaretaker_pk PRIMARY KEY(OC_Id), CONSTRAINT othercaretaker_swimmer_fk FOREIGN KEY(SwimmerId) REFERENCES Swimmer(SwimmerId), CONSTRAINT othercaretaker_caretaker_fk FOREIGN KEY(CT_Id) REFERENCES Caretaker(CT_Id) DROP TABLE IF EXISTS LevelHistory; CREATE TABLE LevelHistory( LH_Id INT UNSIGNED AUTO_INCREMENT, SwimmerId LevelId StartDate DATE NOT NULL, VARCHAR(250), CONSTRAINT levelhistory_pk PRIMARY KEY(LH_Id), CONSTRAINT levelhistory_ck_1 UNIQUE(SwimmerId, LevelId), CONSTRAINT levelhistory_swimmer_fk FOREIGN KEY(SwimmerId) REFERENCES Swimmer(SwimmerId), CONSTRAINT levelhistory_level_fk FOREIGN KEY(LevelId) REFERENCES Level(LevelId) DROP TABLE IF EXISTS Meet; CREATE TABLE Meet( MeetId INT UNSIGNED AUTO_INCREMENT, Title VARCHAR(100) NOT NULL, Date DATE NOT NULL, StartTime TIME NOT NULL, EndTime TIME NOT NULL, VenueId CoachId CONSTRAINT meet_pk PRIMARY KEY(MeetId), CONSTRAINT meet_venue_fk FOREIGN KEY(VenueId) REFERENCES Venue(VenueId), CONSTRAINT meet_coach_fk FOREIGN KEY(CoachId) REFERENCES Coach(CoachId) DROP TABLE IF EXISTS Event; CREATE TABLE Event( EventId INT UNSIGNED AUTO_INCREMENT, Title VARCHAR(100) NOT NULL, StartTime TIME NOT NULL, EndTime TIME NOT NULL, MeetId LevelId CONSTRAINT event_pk PRIMARY KEY(EventId), CONSTRAINT event_meet_fk FOREIGN KEY(MeetId)

5 REFERENCES Meet(MeetId), CONSTRAINT event_level_fk FOREIGN KEY(LevelId) REFERENCES Level(LevelId) DROP TABLE IF EXISTS Participation; CREATE TABLE Participation( ParticipationId INT UNSIGNED AUTO_INCREMENT, SwimmerId EventId Committed BOOLEAN, CommitTime DATETIME, Participated BOOLEAN, Result VARCHAR(100), VARCHAR(100), CoachId INT UNSIGNED, CONSTRAINT participation_pk PRIMARY KEY(ParticipationId), CONSTRAINT participation_ck_1 UNIQUE(SwimmerId, EventId), CONSTRAINT participation_swimmer_fk FOREIGN KEY(SwimmerId) REFERENCES Swimmer(SwimmerId), CONSTRAINT participation_event_fk FOREIGN KEY(EventId) REFERENCES Event(EventId), CONSTRAINT participation_coach_fk FOREIGN KEY(CoachId) REFERENCES Coach(CoachId) DROP TABLE IF EXISTS V_TaskList; CREATE TABLE V_TaskList( VTL_Id INT UNSIGNED AUTO_INCREMENT, MeetId Required BOOLEAN NOT NULL, Description VARCHAR(250) NOT NULL, Penalty VARCHAR(100), PenaltyAmt DECIMAL(6,2), CONSTRAINT v_tasklist_pk PRIMARY KEY(VTL_Id), CONSTRAINT v_tasklist_meet_fk FOREIGN KEY(MeetId) REFERENCES Meet(MeetId) DROP TABLE IF EXISTS V_Task; CREATE TABLE V_Task( VT_Id INT UNSIGNED AUTO_INCREMENT, VTL_Id Name VARCHAR(100) NOT NULL, VARCHAR(250), Num_V SMALLINT UNSIGNED DEFAULT 1, CONSTRAINT v_task_pk PRIMARY KEY(VT_Id), CONSTRAINT v_task_v_tasklist_fk FOREIGN KEY(VTL_Id)

6 REFERENCES V_Tasklist(VTL_Id) DROP TABLE IF EXISTS Commitment; CREATE TABLE Commitment( CommitmentId INT UNSIGNED AUTO_INCREMENT, CT_Id VT_Id CommitTime DATETIME NOT NULL, Rescinded BOOLEAN, RescindTime DATETIME, CarriedOut BOOLEAN, VARCHAR(100), CoachId INT UNSIGNED, CONSTRAINT commitment_pk PRIMARY KEY(CommitmentId), CONSTRAINT commitment_ck_1 UNIQUE(CT_Id, VT_Id), CONSTRAINT commitment_caretaker_fk FOREIGN KEY(CT_Id) REFERENCES Caretaker(CT_Id), CONSTRAINT commitment_v_task_fk FOREIGN KEY(VT_Id) REFERENCES V_Task(VT_Id), CONSTRAINT commitment_coach_fk FOREIGN KEY(CoachId) REFERENCES Coach(CoachId)

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