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1. Database

2. Introduction
• Good decisions require good information derived from raw
facts
• Data is managed most efficiently when stored in a database
• Databases evolved from computer file systems
• Understanding file system characteristics is important

3. Introduction
• Database
– is collection of related data and its metadata organized in a structured format
– for optimized information management
• Database Management System (DBMS)
– is a software that enables easy creation, access, and modification of databases
– for efficient and effective database management
• Database System
– is an integrated system of hardware, software, people, procedures, and data
– that define and regulate the collection, storage, management, and use of data
within a database environment

4. Why Database
• Databases solve many of the problems encountered in data
management
– Used in almost all modern settings involving data management:
• Business
• Research
• Administration
• Important to understand how databases work and interact with
other applications

5. Data vs. Information
• Data are raw facts
• Information is the result of processing raw data to reveal
meaning
• Information requires context to reveal meaning
• Raw data must be formatted for storage, processing, and
presentation
• Data are the foundation of information, which is the bedrock of
knowledge

6. Database Management
System
• Database Management System or DBMS in
short refers to the technology of storing and
retrieving users data with atmost efficiency
along with appropriate security measures.
• In DBMS, we can create its architecture, data
models, data schemas, E-R model, relation
model, relational database design, and storage
and file structure and much more.

7. Users
• A typical DBMS has users with different rights and
permissions who use it for different purposes. Some users
retrieve data and some back it up. The users of a DBMS can be
broadly categorized as follows −

8. Role and Advantages of the
DBMS
• DBMS is the intermediary between the user and the database
– Database structure stored as file collection
– Can only access files through the DBMS
• DBMS enables data to be shared
• DBMS integrates many users’ views of the data

9. Why Database Design Is
Important
• Database design focuses on design of database structure used
for end-user data
– Designer must identify database’s expected use
• Well-designed database:
– Facilitates data management
– Generates accurate and valuable information
• Poorly designed database:
– Causes difficult-to-trace errors

10. DBMS Software
• Oracle
• Microsoft SQL Server
• My SQL
• NO SQL
• MS- ACCESS
• MS- EXCEL