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Hochschule Ulm Sommersemester 2012 Database Programming Thomas Oppel Matthias Schmitt

Hochschule Ulm Sommersemester 2012 Database Programming Thomas Oppel Matthias Schmitt Benjamin Brand. Tomabe Student Self - Management Software. Overview. User Stories Feature List Specifications & Requirements Entity Relationship Model Data Definition Language

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Hochschule Ulm Sommersemester 2012 Database Programming Thomas Oppel Matthias Schmitt

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  1. Hochschule Ulm Sommersemester 2012 Database Programming Thomas Oppel Matthias Schmitt Benjamin Brand

  2. Tomabe Student Self-Management Software Overview • User Stories • Feature List • Specifications & Requirements • EntityRelationship Model • Data Definition Language • Data Manipulation Language • Select Instruction • StoredProcedures / Cursors • User definedFunctions • Triggers Thomas Oppel // Matthias Schmitt // Benjamin Brand

  3. Tomabe Student Self-Management Software User Stories User Stories Student Self-Management Software As a student I want ... “to see my timetable to manage the time.” “ to have an overview over my marks and ECTS-Points.” “ to have an overview over my tasks.” “ to be warned when a task deadline is less than seven days.” “ to have a list of my contacts in order to manage them.” “ to take part in a community with students of my semester.” Thomas Oppel // Matthias Schmitt // Benjamin Brand

  4. Tomabe Student Self-Management Software Feature List • Create your own profile with an avatar • Create an personalized timetable including courses, lectures and rooms • Manage tasks from your courses (e.g. homework) • Manage general tasks (e.g. book return) • Overview about your open tasks • Warning when task-deadline is close to the end • Overview of your exam results, calculate the average of the exam results • Overview about your earned ECTS-Points • Store E-Mail addresses / phone numbers from important contact people In order to manage and organize student´s life, tomabe provides the right features andfunctions. Thomas Oppel // Matthias Schmitt // Benjamin Brand

  5. Tomabe Student Self-Management Software Specifications & Requirements Specifications & Requirements • Software is based upon the programming language JAVA • MySQL-Database tostoredata • Website / Web-Applicationbased on HTML/PHP • Graphical User Interface -> Ease of use • clear architecture • Well designed database • Fast respondingdatabase • Platformindependent Some Specifications and Requirements which have to been noticed when implementing the software/database. Thomas Oppel // Matthias Schmitt // Benjamin Brand

  6. Tomabe ER-Model Thomas Oppel // Matthias Schmitt // Benjamin Brand

  7. Tomabe Student Self-Management Software Data Definition Language // Examples • # Create the table student • CREATETABLEstudent( • nicknameVARCHAR(50)NOTNULL, • prenameVARCHAR(80)NOTNULL, • lastnameVARCHAR(100)NOTNULL, • passwordVARCHAR(500)NOTNULL, • PRIMARYKEY(nickname) • ) • # Create the table course • CREATETABLEcourse( • courseIDINTauto_incrementNOTNULL, • nameVARCHAR(100)NOTNULL, • semesterVARCHAR(20)NOTNULL, • INDEXsemester_ind(semester), • PRIMARYKEY(courseID,semester) • ) Thomas Oppel // Matthias Schmitt // Benjamin Brand

  8. Tomabe Student Self-Management Software Data Definition Language // Examples • # Create the table task • CREATETABLEtask( • taskIDINTauto_incrementNOTNULL, • descriptionVARCHAR(100)NOTNULL, • deadlineTIMESTAMPDEFAULTCURRENT_TIMESTAMP, • courseIDINTNOTNULL, • nicknameVARCHAR(50)NOTNULL, • islesssevendaysINTDEFAULT0, • doneBOOLEANDEFAULTFALSE, • PRIMARYKEY(taskID), • FOREIGNKEY(courseID) REFERENCEScourse(courseID) • ONDELETECASCADEONUPDATECASCADE, • FOREIGNKEY(nickname) REFERENCESstudent(nickname) • ONDELETECASCADEONUPDATECASCADE • ) Thomas Oppel // Matthias Schmitt // Benjamin Brand

  9. Tomabe Student Self-Management Software Data Manipulation Language // Examples # Insert Into instructions INSERTINTOstudent(nickname,prename,lastname,password) VALUES('matze','Matthias','Schmitt',SHA1('matze')); INSERTINTOuniversity(name,description) VALUES('Hochschule Ulm','Hochschule für Technik und Medien'); INSERTINTOuniversity_has_student(universityID,nickname) VALUES(1,'benny'); INSERTINTOcourse(name,semester) VALUES('Informationsmanagement','WF4'); Thomas Oppel // Matthias Schmitt // Benjamin Brand

  10. Tomabe Student Self-Management Software Select instruction # Build the timetable of a student SELECTDISTINCTstudent.nicknameAS'nickname', course.nameAS'course name', timetable_has_courses.courseDayAS'day', timetable_has_courses.courseTimeAS'time', • timetable_has_courses.roomas'room' FROMstudent JOINstudent_takes_courseON student.nickname=student_takes_course.nickname JOINcourseONstudent_takes_course.courseID= course.courseID JOIN timetable_has_coursesON course.courseID=timetable_has_courses.courseIDAND student.nickname='matze'; LIVE DEMO ! Thomas Oppel // Matthias Schmitt // Benjamin Brand

  11. Tomabe Student Self-Management Software StoredProcedures # Procedure fill data into student table DELIMITER&& CREATEPROCEDUREfillInStudent(INnicknameVARCHAR(50), INprenameVARCHAR(50), INlastnameVARCHAR(50), INpasswordVARCHAR(50)) BEGIN INSERTINTOstudent(nickname,prename,lastname,password) VALUES(nickname,prename,lastname,SHA1(password)); END&& DELIMITER; Thomas Oppel // Matthias Schmitt // Benjamin Brand

  12. Tomabe Student Self-Management Software StoredProcedures • # Procedure show the courses of a teacher • DELIMITER&& • CREATEPROCEDUREshowTeachersCourses • (INteacherNameVARCHAR(50)) • BEGIN • SELECTprenameAS'Prename',lastnameAS'Lastname', • nameAS'Course',titleAS'Title'FROMlecturerl • JOINlecturer_teaches_coursesltcJOINcoursecou • ONl.lecturerID=ltc.lecturerIDAND • ltc.courseID=cou.courseID • WHEREl.lastname=teacherName; • END&& • DELIMITER; LIVE DEMO ! Thomas Oppel // Matthias Schmitt // Benjamin Brand

  13. Tomabe Student Self-Management Software StoredProcedures • # Procedure show the courses of a teacher • # RESULT for lecturer “Ottmann” CALLshowTeachersCourses ('Ottmann'); Thomas Oppel // Matthias Schmitt // Benjamin Brand

  14. Tomabe Student Self-Management Software StoredProcedures # Procedure set a flag into task table when task-deadline # is less than seven days DELIMITER&& CREATEPROCEDUREsetTaskFlaglessSevenDays(nameVARCHAR(50)) BEGIN DECLAREnoMoreINT; DECLAREdeadDATETIME; DECLAREidTaskINT; DECLARECursorOneCURSORFOR SELECTdeadlineFROMtaskWHEREnickname=name; DECLARECursorTwoCURSORFOR SELECTtaskIDFROMtaskWHEREnickname=name; DECLARECONTINUEHANDLERFORNOTFOUNDSETnoMore=1; SETnoMore=0; Thomas Oppel // Matthias Schmitt // Benjamin Brand

  15. Tomabe Student Self-Management Software StoredProcedures • WHILE(noMore=0)DO • FETCHCursorOneINTOdead; • FETCHCursorTwoINTOtaskID; • IF(noMore=0)THEN • IF(DATEDIFF(dead,now())<7)THEN • UPDATEtaskSETlesssevendays=-1WHEREtaskID=idTask; • ELSE • UPDATEtaskSETlesssevendays=1WHEREtaskID=idTask; • ENDIF; • ENDIF; • ENDWHILE; • CloseCursorOne; • CloseCursorTwo; • END&& • DELIMITER; LIVE DEMO ! LIVE DEMO ! Thomas Oppel // Matthias Schmitt // Benjamin Brand

  16. Tomabe Student Self-Management Software StoredProcedures • # Procedure set a flag into task table when task-deadline • # is less than seven days CALLsetTaskFlaglessSevenDays (‘matze'); Value -1 becausedeadlineislessthansevendaystocurrentdate Thomas Oppel // Matthias Schmitt // Benjamin Brand

  17. Tomabe Student Self-Management Software StoredProcedures • # Procedure set done to a task • DELIMITER $$ • CREATEPROCEDUREis_done() • BEGIN • DECLAREisItDoneBOOLEAN;DECLAREnoMoreDoneINT; • DECLAREtaskIDCounterINTUNSIGNED; • DECLAREgetDoneCRSCURSORFOR • SELECTdoneFROMtask; • DECLARECONTINUEHANDLERFORNOTFOUNDSETnoMoreDone=1; • SETnoMoreDone=0; • SETisItDone=FALSE; • SETtaskIDCounter=0; • OPENgetDoneCRS; Thomas Oppel // Matthias Schmitt // Benjamin Brand

  18. Tomabe Student Self-Management Software StoredProcedures • WHILE (noMoreDone=0)DOFETCHgetDoneCRSINTOisItDone; • SETtaskIDCounter=taskIDCounter+1; • IF(noMoreDone=0)AND(isItDoneisTRUE)THEN • UPDATEtaskSETdeadline=''WHEREtaskID=taskIDCounter; • ENDIF; • ENDWHILE; • CLOSEgetDoneCRS; • END $$ • DELIMITER; LIVE DEMO ! Thomas Oppel // Matthias Schmitt // Benjamin Brand

  19. Tomabe Student Self-Management Software User definedfunctions # Function calculates the sum of ECTS-Points DELIMITER// CREATEFUNCTIONectsSum(nameVARCHAR(50))RETURNSINT BEGIN DECLAREsumECTSINT;DECLAREsumNEWINT; DECLAREnoMoreECTSINT; DECLARECursornewCURSORFOR SELECTectsFROMstudent_takes_course WHEREnickname=name; DECLARECONTINUEHANDLERFORNOTFOUNDSETnoMoreECTS=1; SETnoMoreECTS=0,sumECTS=0; OPENCursornew; Thomas Oppel // Matthias Schmitt // Benjamin Brand

  20. Tomabe Student Self-Management Software User definedfunctions • WHILE(noMoreECTS=0)DOFETCHCursornewINTOsumNEW; • IF(noMoreECTS=0)AND(sumNEWISNOTNULL)THEN • SETsumECTS=sumECTS+sumNEW; • ENDIF; • ENDWHILE; • CLOSECursornew; • RETURNsumECTS; • END// • DELIMITER; LIVE DEMO ! LIVE DEMO ! Thomas Oppel // Matthias Schmitt // Benjamin Brand

  21. Tomabe Student Self-Management Software User definedfunctions • # Function calculates the sum of ECTS-Points • # RESULT: Example for the student with the nickname “matze” SELECTectsSum ('matze'); Thomas Oppel // Matthias Schmitt // Benjamin Brand

  22. Tomabe Student Self-Management Software User definedfunctions # Function calculates the average of students marks DELIMITER&& CREATEFUNCTIONavaMark(nameVARCHAR(50)) RETURNSDECIMAL(10,3) BEGIN DECLAREaMarkDECIMAL(10,3);DECLARElMarkDECIMAL(10,3); DECLAREnMarkINT;DECLAREnoMoreMarksINT; DECLARECursCURSORFOR SELECTMarkFROMstudent_takes_course WHEREnickname=nameORDERBYMarkASC; DECLARECONTINUEHANDLERFORNOTFOUNDSETnoMoreMarks=1; SETnoMoreMarks=0,aMark=0,nMark=0; OPENCurs; Thomas Oppel // Matthias Schmitt // Benjamin Brand

  23. Tomabe Student Self-Management Software User definedfunctions • WHILE(noMoreMarks=0)DOFETCHCursINTOlMark; • IF(noMoreMarks=0)AND(lMarkISNOTNULL)THEN • SETnMark=nMark+1,aMark=aMark+lMark; • ENDIF; • ENDWHILE; • CLOSECurs; • IFnMark>0THENRETURNaMark/nMark; • ELSERETURNNULL; • ENDIF; • END&& • DELIMITER; LIVE DEMO ! Thomas Oppel // Matthias Schmitt // Benjamin Brand

  24. Tomabe Student Self-Management Software Triggers # Trigger set new mark to -1 when ifis false DELIMITER $$ CREATETRIGGERbu_student_takes_course BEFOREUPDATEONstudent_takes_courseFOREACHROW BEGIN IFNEW.mark<1ORNEW.mark>5THEN SETNEW.mark=-1; ENDIF; END $$ DELIMITER; • # Trigger set deadline to current date if entry is false DELIMITER $$ CREATETRIGGERbi_taskBEFOREINSERTONtask FOREACHROW BEGIN IFNEW.deadline<CURRENT_TIMESTAMP()THEN SETNEW.deadline=CURRENT_TIMESTAMP(); ENDIF; END $$ DELIMITER; LIVE DEMO ! Thomas Oppel // Matthias Schmitt // Benjamin Brand

  25. Hochschule Ulm Sommersemester 2012 Database Programming Thomas Oppel Matthias Schmitt Benjamin Brand

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