MONASH INFORMATION TECHNOLOGY The Relational Database Model Overview We now have a conceptual model for Monash Software, it is time to move to the second stage and map this to a logical model For our unit this will involve mapping to the Relational Model in preparation for implementation in a RDBMS ▪ Relational Model ▪ […]
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FIT2094-FIT3171 Databases 2021 Semester Summer B Assignment 1B – Normalisation and Logical Database Design Monash Dental (MD) FIT2094 Learning Outcomes: 2, 3, 4 (see Unit Preview) FIT3171 Learning Outcomes: 2, 4, 5 (see Unit Preview) Assignment weighting 15% Assignment marked out of 100 and released as a grade out of 15 This task continues the
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The Relational Database Model MONASH INFORMATION TECHNOLOGY Overview We now have a conceptual model for Monash Software, it is time to move to the second stage and map this to a logical model For our unit this will involve mapping to the Relational Model in preparation for implementation in a RDBMS ▪ Relational Model ▪
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Update, Delete and Transaction Management MODIFYING ROWS USING UPDATE AND DELETE 2 UPDATE ▪ Changes the value of existing data. ▪ For example, at the end of semester, change the mark and grade from null to the actual mark and grade. UPDATE enrolment SET mark = 80, grade =’HD’ WHERE sno = 112233 and ……
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MONASH INFORMATION TECHNOLOGY Database Design II: Logical Modelling Reference Several of the examples and diagrams used this session have been taken from: Hoffer, J. A. , Prescott, M. B. & McFadden, F. R. “Modern Database Management” 2 2 Step 2 (and 3) of the Design Process ▪ Step 1 Conceptual Model (session 2) – Database
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FIT2094-FIT3171 Databases 2021 Summer B Assignment 1B Checklist Required Actions: ❏ Normalisation ❏ Normalised two forms (Running Sheet and one of the Appointment Completion Reports) both from UNF to 3NF showing all forms and dependencies at each step (i.e. partial dependencies in 1NF, transitive dependencies in 2NF, full dependencies in 3NF) ❏ Includes all attributes
MONASH INFORMATION TECHNOLOGY Creating & Populating the Database – Data Definition Language User requirements Relational model theories Oracle syntax Draw Conceptual conceptual ERD ERD Draw logical level Model Logical level Model Write database schema Database schema Business rules ERD notations Normalisation 2 2 SQL general syntax ▪ A single statement is ended with SEMICOLON. ▪
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MONASH INFORMATION TECHNOLOGY Structured Query Language (SQL) – Part 1 Anatomy of an SQL SELECT Statement SELECT stud_nbr, stu_fname, stu_lname FROM student WHERE stu_fname = ‘Maria’; clauses statement Predicate / search condition 2 2 What table(s) the data come from? SQL SELECT Statement – Usage What column/s to display SELECT stud_nbr, stu_fname, stu_lname FROM student
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Update, Delete and Transaction Management MODIFYING ROWS USING UPDATE AND DELETE 2 UPDATE ▪ Changes the value of existing data. ▪ For example, at the end of semester, change the mark and grade from null to the actual mark and grade. …… 3 • 4 TRANSACTIONS 5 Transactions ▪ Consider the following situation. Sam is
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MONASH INFORMATION TECHNOLOGY Creating & Populating the Database – Data Definition Language Workshop Q&A User requirements Relational model theories Oracle syntax Draw Conceptual conceptual ERD ERD Draw logical level Model Logical level Model Write database schema Database schema Business rules ERD notations Normalisation 2 2 SQL general syntax ▪ A single statement is ended with
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