Database

Tuesday, 21 August 2012

Data Dictinary

  • A data dictionary is a documentation used to categorize, explain and apply constraints to all attributes in a database.
  • It is NOT part of the schema, but it is an essential piece of documentation that goes with your database.
  • Data Dictionaries are implemented into the DBMS.

Posted by Unknown at 15:55
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Blog Archive

  • ▼  2012 (44)
    • ►  October (4)
    • ►  September (1)
    • ▼  August (39)
      • Other SELECT commands
      • SELECT with conditions
      • SELECT statement
      • Writing SQL Commands
      • Data Manipulation
      • Structured Query Language
      • Boyce-Codd Normal Form
      • Key Types
      • Improving the Design
      • 2NF to 3NF
      • 3rd Normal Form(3NF)
      • 1NF to 2NF
      • 2nd Normal Form(2NF)
      • UNF to 1NF
      • 1st Normal Form(1NF)
      • UN-Normalized Form(UNF)
      • Data Redundancy
      • Functional dependency
      • Normalization
      • Data Dictinary
      • Integrity Rules
      • Foreign Key
      • Converting From ERD
      • Converting from ERD
      • Relational Model
      • ERD making tips
      • Composite Entities
      • Super and Sub Type
      • Composite Keys
      • Primary Keys
      • Entity
      • Entity Relationship Diagram(ERD)
      • Basic Modeling Concepts
      • The Database Model
      • Database Design
      • Database Systems Environment
      • DBMS Functions
      • Types of Database
      • Introducing the Database
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