The document discusses database normalization. It defines several normal forms including 1NF, 2NF, 3NF, BCNF, 4NF and 5NF. For each normal form, it provides a brief definition and explains how the current normal form builds upon the previous one by further restricting dependencies between attributes in a database table. The goal of normalization is to eliminate redundant or anomalous data and optimize database structure.
The document discusses database normalization. It defines several normal forms including 1NF, 2NF, 3NF, BCNF, 4NF and 5NF. For each normal form, it provides a brief definition and explains how the current normal form builds upon the previous one by further restricting dependencies between attributes in a database table. The goal of normalization is to eliminate redundant or anomalous data and optimize database structure.
The document discusses database normalization. It defines several normal forms including 1NF, 2NF, 3NF, BCNF, 4NF and 5NF. For each normal form, it provides a brief definition and explains how the current normal form builds upon the previous one by further restricting dependencies between attributes in a database table. The goal of normalization is to eliminate redundant or anomalous data and optimize database structure.
The document discusses database normalization. It defines several normal forms including 1NF, 2NF, 3NF, BCNF, 4NF and 5NF. For each normal form, it provides a brief definition and explains how the current normal form builds upon the previous one by further restricting dependencies between attributes in a database table. The goal of normalization is to eliminate redundant or anomalous data and optimize database structure.
This document discusses the components of an entity-relationship diagram including entities, attributes, relationships, and constraints. An entity-relationship diagram is a conceptual data model that shows entities, attributes, and relationships. The diagram defines entities, attributes, and three types of relationships: one-to-one, one-to-many, and many-to-many. It also covers cardinality and participation constraints that specify the minimum and maximum number of relationships allowed.
This document discusses database management concepts. It defines key terms like bit, byte, field, record, and file. It describes different data types that can be stored in a database like text, images, audio. It explains different file organizations like sequential, indexed sequential and direct file. It provides examples of how data from different departments can be organized into master files and transaction files in a database using a DBMS. Records from employee and salesman tables are shown to illustrate how data is stored and accessed.
This document discusses database management concepts. It defines key terms like bit, byte, field, record, and file. It describes different data types that can be stored in a database like text, images, audio. It explains different file organizations like sequential, indexed sequential and direct file. It provides examples of how data from different departments can be organized into master files and transaction files in a database using a DBMS. Records from employee and salesman tables are shown to illustrate how data is stored and accessed.