Introduction to Database Management Systems
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The document provides an overview of database management systems (DBMS), outlining key concepts such as data and information, the characteristics of databases, and their applications in various sectors. It discusses the objectives and advantages of DBMS, including data integrity, security, and improved access for users. Additionally, the document describes the components and architecture of a DBMS.
Introduction to Database Management Systems
- 1. 1 Introduction to Data Base Management Systems Dr. C.V. Suresh Babu Professor Department of IT Hindustan Institute of Science & Technology Data base Technologies (ITB4201) Department of Information Technology
- 2. 2 Discussion Topics • Data and Information • Database • Database Management System • Objectives • Advantages • Components • Architecture Data base Technologies (ITB4201) Department of Information Technology
- 3. 3 Data and Information • Data can be defined as a representation of facts, concepts, or instructions in a formalized manner, which should be suitable for communication, interpretation, or processing by human or electronic machine. Example: TN, Anniyappa , Seven Wells, Chennai, 600001, Publications • Information is organized or classified data, which has some meaningful values for the receiver. Information is the processed data on which decisions and actions are based. Example Anniyappa Seven Wells Chennai, Tamil Nadu 600001 Data base Technologies (ITB4201) Department of Information Technology
- 4. 4 Characteristics of Data in a Database • Shared • Persistence • Validity / Integrity / Correctness • Security • Consistency • Non–redundancy • Independence Data base Technologies (ITB4201) Department of Information Technology
- 5. 5 Database • A database is a collection of information that is organized so that it can be easily accessed, managed and updated. Computer databases typically contain aggregations of data records or files, containing information about students details or Employee information. • Examples – online services, Railway reservation, Bank Transactions Data base Technologies (ITB4201) Department of Information Technology
- 6. 6 Examples of database application – Computerized library systems – Automated teller machines – Flight reservation systems: For reservations and schedule information. – Inventory management Systems – Banking: For customer information, accounts, loans and banking transactions – Universities: For student information, course registrations and grades. – Telecommunications: For keeping records of calls made, generating monthly bills, maintaining balances on prepaid calling cards and storing information about the communication networks. – Sales: For customer, product and purchase information in any industry. Data base Technologies (ITB4201) Department of Information Technology
- 7. 7 Objectives DBMS applications must be capable of solving challenging problems of different organizations. some objectives of DBMS are given below – Provide for mass storage of relevant data – Making easy access to data for the authorized user. – Providing prompt response to users requests for data. – Eliminate redundantly (Duplicate) d data. – Allow multiple users to be active at one time. – Allow the growth of database system – Provide data integrity. – Protect the data from physical harm and unauthorized access. – Serving different types of users. the – Provide security with a user access privilege. – Combining interrelated data to generate a report – Provide multiple views for same data. Data base Technologies (ITB4201) Department of Information Technology
- 8. 8 Advantages • Reduced data redundancy • Improved data integrity • Increased user productivity • Data independence and efficient access • Reduced application development time • Concurrent access, recovery from crashes • Data integrity and security • Uniform data administration • Remote access (Internet servers) Data base Technologies (ITB4201) Department of Information Technology
- 9. 9 Components Data base Technologies (ITB4201) Department of Information Technology
- 10. 10 Architecture • File Manager: • Database Manager: • Query processor: • DML pre-compiler • The DDL compiler: Data base Technologies (ITB4201) Department of Information Technology