tailieunhanh - Chapter 7: Functional Dependencies

Chapter 7: Functional Dependencies presents about Informal Design Guidelines for Relational Databases (Semantics of the Relation Attributes, Redundant Information in Tuples and Update Anomalies, Null Values in Tuples, Spurious Tuples), Functional Dependencies (FDs). | Chapter 7 Functional Dependencies Copyright 2004 Pearson Education Inc. Outline Informal Design Guidelines for Relational Databases - Semantics of the Relation Attributes - Redundant Information in Tuples and Update Anomalies - Null Values in Tuples - Spurious Tuples Functional Dependencies FDs - Definition of FD - Inference Rules for FDs - Equivalence of Sets of FDs - Minimal Sets of FDs Slide 7 -2 Elmasri Navathe Fundamentals of Database Systems Fourth Edition Copyright 2004 Ramez Elmasri and Shamkant Navathe Informal Design Guidelines for Relational Databases 1 What is 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 What are the criteria for good base relations Elmasri Navathe Fundamentals of Database Systems Fourth Edition Slide 7 -3 Copyright 2004 Ramez Elmasri and Shamkant .

• Cơ sở dữ liệu
• Functional Dependencies
• Informal Design Guidelines for Relational Databases
• Functional Dependencies
• Semantics of the Relation Attributes
• Null Values in Tuples
• Spurious Tuples
• Summary of mathematics doctoral thesis
• Math Fundamentals for Informatics
• Discovering functional dependencies
• Relaxed functional dependencies in databases
• Range of relational databases
• Functional dependency
• Conditional functional dependency
• Association rule
• Data dependencies
• Unified hierarchy for FDs
• TREATMENT OF LONG DISTANCE
• DEPENDENCIES IN LFG
• TAG FUNCTIONAL UNCERTAINTY IN LFG IS A COROLLARY IN TAG
• scientific reports
• model language
• process natural language
• Database System
• Cơ sở dữ liệu
• Lecture Database
• Data modeling
• Relational databases
• Relation attributes
• Fundamentals of Database Systems
• Database Systems
• Normalization for relational databases
• Lecture Database systems
• Top Down database design
• Closure of sets of FDs
• Nonprime attributes
• Database management systems
• Lecture Database management systems
• Trivial FDs
• Armstrong’s axioms
• Redundancy of FDs
• Normalization for relational DBs
• Redundant information
• Direct dependency
• FD constraints
• Update Anomalies
• Primary Keys
• Data cleansing
• Conditional functional dependencies
• Cause of errors
• Multi tuple violations
• Traditional functional dependencies
• grammatical functions
• constituent structure
• phrase structure
• constraining equation
• Long Distance Dependencies
• Minigrammar of English
• Inference Rules for FDs
• Equivalence of Sets of FDs
• Minimal Sets of FDs
• Hệ quản trị cơ sở dữ liệu
• Database Management System
• Phụ thuộc hàm
• Hệ luật dẫn Armstrong
• Lecture Database system
• Relational database
• Key finding algorithms
• Phụ thuộc hàm xấp xỉ
• Luật kết hợp
• Approximate functional dependencies
• Association rules
• Biểu diễn phụ thuộc hàm xấp xỉ
• Ma trận phân biệt được