Database Foundations. 5-1 Mapping Entities and Attributes. Copyright 2015, Oracle and/or its affiliates. All rights reserved.
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2 Database Foundations 5-1
3 Road Map You are here Mapping Entities and Attributes Mapping Primary and Foreign Keys 3
4 Objectives This lesson covers the following objectives: Describe why you need to create a relational model Explain the naming conventions used in a relational database 4
5 Objectives This lesson covers the following objectives: Use Oracle SQL Developer Data Modeler to apply naming standards by creating: Glossary Name abbreviations Design rules Custom rules Transformations Map simple entities to tables Map attributes to column names 5
6 Need for Creating a Relational Model A relational model: Is the blue print for the actual database implementation Can be used as the basis for implementing any type of DBMS. The ideal model can be adapted to an RDBMS model. 6
7 Transformation Process: Logical to Relational Model Logical Model Transformation Relational Model 7
8 Tables: A Recap Table: EMPLOYEES Columns ID Name Address Birth_date Department_ID 110 Jones 12 Oxford Street Rows 301 Smith 53 Hayes Drive Gonzales 5609 Maple Court Primary key column Foreign key column to the DEPARTMENTS table Table in the relational model 8
9 Terminology Mapping: A Recap ANALYSIS Logical model Entity Attribute Primary UID Secondary UID Relationship Business constraints DESIGN Relational model Table Column Primary key Unique constraint Foreign key Check constraints 9
10 Naming Conventions Decide on conventions for: Table names Column names and special characters (%, *, #, -, space, ) Table short names (abbreviations) 10
11 Naming Conventions Decide on conventions for: Primary and unique key constraint names Foreign key constraint names Foreign key column names Check constraints 11
12 Naming Restrictions with Oracle Database Table and column names: Must start with a letter May contain up to 30 alphanumeric characters Must not contain spaces or some special characters Must avoid reserved words Table names must be unique within a schema. Column names must be unique within a table. 12
13 Applying Naming Standards Using Oracle SQL Developer Data Modeler Glossary Logical Model Name Translation Naming Templates Relational Model Name Formatter Naming Restrictions Design Rule Validation 13
14 Glossary Creating a Glossary from a Logical Model 14
15 Glossary Editor 15
16 Glossary Editor 16
17 Name Abbreviations Example of a.csv file content 17
18 Executing Design Rules a b 18
19 Creating Rule Sets for Design Rules b a c 19
20 Custom Design Rules and Transformation 20
21 Custom Design Rules and Transformation 21
22 Case Scenario: Design Rules Let me see if the ERD for the Simplified Library Management System is complying with the database design rules. If the ERD is not complying with the design rules, can I fix it? 22
23 Case Scenario: Applying Design Rules a b c The warning is fixed, and now the design is OK. 23
24 Mapping Simple Entities to Tables Entities Tables 24
25 Naming Entities a b c 25
26 Engineering Entities 26
27 Mapping Attributes to Columns Entities Tables 27
28 Mapping Attributes to Columns: Column Names 28
29 Engineering Attributes 29
30 Reviewing the Glossary 30
31 Adding the Glossary as the Naming Standard a b c 31
32 Mapping Attributes to Columns with the Glossary Entities Tables After Glossary Is Applied 32
33 Applying Name Abbreviations a c b 33
34 Summary In this lesson, you should have learned how to: Describe why you need to create a relational model Explain the naming conventions used in a relational database 34
35 Summary In this lesson, you should have learned how to: Use Oracle SQL Developer Data Modeler to apply naming standards by creating: Glossary Name abbreviations Design rules Custom rules Transformations Map simple entities to tables Map attributes to column names 35
36
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