The World Of Database Systems

Summary of The World of Database Systems

Database Management Systems: A DBMS is characterized by the capability to support efficient access to huge amounts of data, which persists over time. It is also characterized by support for powerful query languages and for durable transactions that can execute

Information Integration Overview

Much of the recent development of database systems has been toward capabilities that allow different data sources, which may be databases and / or information resources that are not managed by a DBMS

Database System Implementation

The subject of database system implementation can be divided roughly into three parts: 1. Storage management: how secondary storage is used effectively to hold data and allow it to be accessed quickly.

Database Programming

The following categories cover database programming. a) Relational Algebra b) The Database Language SQL c) Constraints and Triggers d) System Aspects of SQL e) Object-Orientation in Query Languages f) Logical Query Languages We start in category “Relational Algebra” with an abstract treatment of queries in the

Database Design

“The Entity-Relationship Data Model” begins with a high-level notation for expressing database designs, called the entity-relationship model. We introduce in “The Relational Data Model” the relational model, which is the model used by the most widely adopted DBMS's,

Outline of Database-System Studies

Ideas related to database systems can be divided into three broad categories: 1. Design of databases. How does one develop a useful database? What kinds of information go into the database? How is the information structured? What

The Query Processor

The portion of the DBMS that most affects the performance that the user sees is the query processor. In following figure the query processor is

Transaction Processing

It is normal to group one or more database operations into a transaction, which is a unit of work that must be carried out atomically and in obvious separation from other transactions. In addition

Storage and Buffer Management

The data of a database generally exists in secondary storage; in today's computer systems secondary storage" generally means magnetic disk. However, to carry out any useful operation on data,

Overview of Query Processing

The great majority of connections with the DBMS follow the path on the left side of following figure. A user or an application program starts some action that does not affect the diagram of the database

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