databases and types of databases

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DATABASES AND TYPES OF DATABASES

Disclaimer: This presentation is prepared by trainees of baabtra as a part of mentoring program. This is not official document of baabtra –Mentoring PartnerBaabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd

DATABASE MANAGEMENT SYSTEM

A Database is a collection of records.

Database management systems are designed

as the means of managing

all the records. DBMS is a software system

designed to allow the definition , update ,

retrieval and administration of databases.

TYPES OF DATABASE

• Relational database• Document oriented database• Embedded database• Graph database• Hypertext database• Operational database• Distributed database • Flat file

Relational Database

• A relational database is a database that has a collection

of tables of data items.

• Data in a single table represents a relations.

• Tables consist of rows and columns.

• The columns constitute the attributes.

• The rows constitute tuples.

• Row-A data set representing a single item.

• Column-A labeled element of a tuple, e.g. "Address" or "Date of

birth”, of multiple data item.

• A primary key is used to uniquely identify each row.

• The foreign key a column or group of columns in one table

that points to the primary key of another table.

• A stored procedure is executable code that is associated with,

and generally stored in, the database.

Document Oriented Database

• A computer program designed for storing, retrieving and

managing document oriented information.

• Documents inside a document-oriented database are similar to

records or rows in relational databases.

• Do not store data in tables with uniform sized fields for each

record.

• Any number of fields of any length can be added to a document.

Embedded Database

•The databases consist of data developed by individual end

users.

•Examples of these are collection of documents, spreadsheets,

presentations and other files.

Graph Database

• A graph database is a database that uses graph structures with

nodes, edges, and properties to represent and store data.

• A graph database is any storage system that provides index-

free adjacency.

• This means that every element contains a direct pointer to its

adjacent elements.

Hypertext Database

• Hypertext databases are particularly useful for organizing

large amount of disparate information.

• Hypertext is text displayed on a computer display or other

electronic devices with references to other text which the

reader can immediately access.

• Pages often written in HTML.

Operational database

• An operational database contains data about the

things that go on inside an organization or enterprise.

• Example: data on customer complaints, employee

information, etc.

Distributed Database• It is a database in which portions of the database are stored on

multiple computers within a network.

• The DDBMS synchronizes all the data periodically.

• Updates and deletes performed on the data at one location will

be automatically reflected in the data stored elsewhere.

Flat File

• A flat file database is a database that stores data in a

plain text file.

• Flat files are ideal for small amount of data.

• Each line of the text file holds one record, with fields

separated by delimiters, such as commas or tabs.

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