TAILIEUCHUNG - Lecture Database management systems - Chapter 7: Normalization for relational databases

Chapter 7 presents the following content: Informal design guidelines for relational databases, semantics of the relation attributes, redundant information in tuples and update anomalies, null values in tuples, introduction to normalization, first normal form, second normal form, third normal form, BCNF (boyce-codd normal form),. | Normalization for Relational Databases Informal Design Guidelines for Relational Databases Relational database design: The grouping of attributes to form "good" relation schemas Two levels of relation schemas: ◦ The logical "user view" level ◦ The storage "base relation" level Design is concerned mainly with base relations Criteria for "good" base relations: ◦ Discuss informal guidelines for good relational design ◦ Discuss formal concepts of functional dependencies and normal forms 1NF 2NF 3NF BCNF Semantics of the Relation Attributes Each tuple in a relation should represent one entity or relationship instance ◦ Only foreign keys should be used to refer to other entities ◦ Entity and relationship attributes should be kept apart as much as possible ◦ Design a schema that can be explained easily relation by relation. The semantics of attributes should be easy to .

• Cơ sở dữ liệu
• Database management systems
• Lecture Database management systems
• Relational databases
• Normalization for relational databases
• Informal design guidelines
• The relation attributes
• Lecture Database Systems
• Database systems
• Database systems concepts
• Database systems architecture
• Database languages
• Data management systems framework
• File based system
• Characteristics of the database
• Data dictionary
• Fundamentals of database management systems
• Logical database design
• Physical database design
• Object oriented database management
• Data administration
• Bài giảng Hệ quản trị cơ sở dữ liệu
• Operating systems
• Attribute alias
• Relational database design
• EER to relational mapping
• Mapping EER model
• Regular entity types
• Database application development process
• Data flow diagrams
• Database design
• Lecture Distributed Database Management Systems
• Distributed Database Management Systems
• Bài giảng Hệ quản trị cơ sở dữ liệu phân tán
• Transaction management
• Database consistency
• Database development
• Database environments
• Object database management systems
• Object database
• Distributed database systems
• Principles of distributed database systems
• Cơ sở dữ liệu phân tán
• Peer to peer data management
• Peer reference architecture
• Web data management
• Web models
• Entity relationship model
• ER Diagram
• ER model
• Relational model
• Relational data model
• Relational database
• Relation schema
• Database definition
• Commercial applications
• File processing system
• Database architecture
• Data independence
• Conceptual schema
• Physical implementation of the database
• Physical data independence
• Cross reference matrix
• Database modeling
• Entity relationship data model
• Semantic data model
• Conceptual database design
• Data flow diagram
• E R data model
• E R database design
• Mathematical relations
• Normalization summary
• Data processing
• Consistent state of the database
• Transaction terminates
• Transaction boundaries
• Traditional file processing system
• Database approach
• Distributed computing system
• Fragmentation transparency
• Operating system
• Data modeling
• Relational data retrieval
• Relational database model
• Introduction to MIS
• Management Information Systems
• Information systems
• Database applications