1. multimedia Database

2. MMDB
A Multimedia Database (MMDB) texts, images, graphics, animations, video, sound recordings, music, signals etc. These data types are categorized into three classes:
Static media
image and graphic object.
Dynamic media
audio, video and animation.
Dimensional media
3D game and computer aided drafting programs.

3. ISSUES AND CHALLENGES Multimedia data often require a large storage.
Multimedia database consume a lot of processing time, as well as bandwidth.
Some multimedia data types such as video, audio, and animation sequences have temporal requirements
Images, video and graphics data have spatial constraints in terms of their content.
Content-based multimedia information retrieval

4. MULTIMEDIA DATABASE APPLICATION AREAS:
Digital Libraries
News-on-Demand
Video-on-Demand
Music database
Geographic Information Systems (GIS)
Telemedicine

5. DIFFERENCE BETWEEN DBMS AND RDBMS?
DBMS - Database Management System.
-> DBMS enable creation, modification to be carried out in Database. -> DBMS can be carried out with various models like Relational model, Object model, hierarchical and so on...
RDBMS - Relational Database Management System.
-> Relational model of carrying out the database is know as RDBMS ( Relational Database Management System ) -> The reason behind following RDBMS model for database management is it as many advantages which are as follows...

6. Index Methods for RDBMS
Hashing Methods:
Linear Hashing, extendible hashing
B-tree family:
B+-trees and variations
Both of them are one-dimensional

7. Spatial Database Systems
A spatial database is a database that is optimized to store and query data that represents objects defined in a geometric space.
Most spatial databases allow representing simple geometric objects such as points, lines and polygons.
While typical databases are designed to manage various numeric and character types of data, additional functionality needs to be added for databases to process spatial data types efficiently.
GIS, CAD/CAM

8. Temporal Database Systems
A temporal database is a database with built-in support for handling data involving time, being related to the slowly changing dimension concept, for example a temporal data model and a temporal version of Structured Query Language (SQL).
More specifically the temporal aspects usually include valid time and transaction time. These attributes can be combined to form bitemporal data.
Valid time is the time period during which a fact is true with respect to the real world.
Transaction time is the time period during which a fact stored in the database is considered to be true.
Bitemporal data combines both Valid and Transaction Time.Billing, medical records

9. Spatio-temporal Databases
A spatiotemporal database is a database that manages both space and time information. Common examples include:
Tracking of moving objects, which typically can occupy only a single position at a given time.
An index of species in a given geographic region, where over time additional species may be introduced or existing species migrate or die out.
Historical tracking of plate tectonic activity.
Moving objects, changing regions, etc

10. Multimedia and medical databases
In present there are used a large variety of digital image modalities:
computed tomography(CT),
position emission tomography (PET),
single position emission computed tomography (SPECT),
ultrasounds, magnetic resonance imaging (MRI),
digital subtraction angiogragy (DSA)
and magnetic source imaging (MSI).

11. Time series databases
A time series database (TSDB) is a software system that is optimized for handling time series data, arrays of numbers indexed by time (a datetime or a datetime range).
In some fields these time series are called profiles, curves, or traces.
A time series of stock prices might be called a price curve.
A time series of energy consumption might be called a load profile.
A log of temperature values over time might be called a temperature trace.
Stock market, ECG, trajectories, etc