Introduction of Database Management System

Give me short notes of Database Management System subject.

[Saksham]

You want to know short notes of Database Management System subject so here I am giving you notes:

Data Models
A collection of tools for describing:
data
data relationships
data semantics
data constraints
Object-based logical models
entity-relationship model
object-oriented model
semantic model
functional model
Record-based logical models
relational model (e.g., SQL/DS, DB2)
network model
hierarchical model (e.g., IMS)

Specification notation for defining the database schema
DDL compiler generates a set of tables stored in a data
dictionary
Data dictionary contains metadata (i.e., data about data)
Data storage and definitionlanguage – special type of DDL in
which the storage structure and access methods used by the
database system are specified

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