ER Example Create your own ER/Table structure diagram DBMAN/Lab 1 ER Example Create your own ER/Table structure diagram SzaboZs

Programmers, Projects, Modules Entities  ER Diagram  Relations  Fields or Entities  Fields  ER Diagram  Relations Fields of Coders? Fields of Modules? Fields of Projects? Relations 1 module  1 project, 1 project  several modules 1:N 1 coder  several modules, one module  several coders N:M  extra attributes for the relation? SzaboZs

During the semester... On the computers: MSSQL (2014 Express Edition, with Management Studio); Oracle (XE + 12c); MariaDB (from XAMPP) PostgreSQL is not installed on the computers... Presentations will sometimes list the TSQL/MySQL/Oracle dialects; you only have to know the TSQL dialect We will use the Oracle demo tables SzaboZs

Tables SzaboZs

Tables (with city) SzaboZs

Northwind SzaboZs

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Today’s task Create database that can be used for demonstration of SQL commands Choose a topic Create ER diagram to plan the data (at least three inter-connected entities) Create the table structure diagram SzaboZs

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