database management system presentaion.pdf
- 1. NAME:-JEET DUBEY UNIVERSITY ROLL NO:-32201222034 PAPER NAME:-DATABASE MANAGEMENT SYSTEM PAPER CODE:-BCAC-401 STREAM:-B.C.A
- 2. DATA Data means facts related to any object in consideration. DATABASE Databaseis a systematiccollection of data. Databases support storage and manipulation of data. Databases make data management easy. For example Facebook uses databaseto store, manipulate and present data related to members, their friends, member activities, messages, advertisements and lot more.
- 3. What is a DBMS? 1. DatabaseManagement Systems is not a new concept. 2. A databasemanagement system (DBMS) is system software for creating and managing databases.DBMS is a collectionof programs which enables its users to access database,manipulate data, reporting/representation ofdata. 3. The DBMS provides users with a systematic way to create, retrieve, updateand manage data WHY DBMS? 1. Manualdatamanagement is time consuming 2. Create database 3. Retrievalof informationfrom the database 4. Update database 5.Manage database 6.Controlredundancy
- 4. CHARACTERISTICSOF DBMS • Presides security and remove redundancy • Self-describing nature of a database system • Insulation between programs and data abstraction • Support of multiple views of the data • Sharing of data and multiuser transaction processing • DAMS allow entities and relations among them to form tat • Follows the ACID cant (Atomicity, Consistence, Isolation, an Durability) • DBMS supports multi-user environment that allows user to manipulate data in parallel TYPES OF DBMS • Hierarchical DBMS • Network Cors • Relational DBMS • Object oriented DBMS
- 5. TYPES OF DBMS • Hierarchical DBMS In a Hierarchical database,model data is organised in a tree like structure.Data in stored Hierarchically (top down or bottom up) format. Data is represented using a parent-child relationship. In HierarchicalDB/S, parent may have many children, but children have only one parent • Network Model The network database model allows each child have multiple parents helps you to address the need to model more complex relationships live as the orders/partsmany-ta-many relationship in this model entities are organized in graph which can be accessed through several paths • Relational Model • Relational DBMSis the most widely used DUMSmodel because it in one of the easiest. This model is based on normalizing data in the rows and columns of the roles relational model stored in fixed structuresand manipulated using SOL • Object-Oriented Model Object Oriented Model data storedin the form of objects. The structure which is called classes. which display data within it. It defines a database as a collection of objects which store both data members values and operations
- 6. • APPLICATIONS OF DBMS Banking-Forcustomerinformation, accountsactivities, payments, deposits, Airlines-Forreservationsand schedule information Universities-Forstudent information,course registration,colleges and grades Telecommunications-Ithelps to keep call records,monthly bills, maintaining balances, etc. Sales- use of storing customer,product & sales information. HR ManagementFor information about employees, salaries, payroll, deduction, generation of paychecks ,etc.
- 7. APPLICATIONS OF DBMS • Manufacturing-it used for the management of supply chain and for tracking productionof items • Finance For storing informationabout stock, sales, and purchases d financialinstruments like stocks and bonds POPULAR DBMS SOFTWARE • MYSQL • Microsoft Access • Oracle • PostgreSQL • dBASE • SQLite • IBM DB2 • MariaDB
- 8. ADVANTAGES OF DBMS DBMS offers a variety of techniques to store& retrievedata DBMS serves an efficient handler to balance the needs of multiple applications using the same data Unformadministration procedures for data Application programmers never exposed to details of cats representation and storage A DBMS uses powerful Function to storeand retrievedata efficantly Offers Data Integrity and Security The DBMS implies integrity constraints to get a high level of protection against prohibited access to data A DBMS schedules concurrent access to the data in such a manner that only one user can access the same datata a time Reduced Application DevelopmentTime
- 9. DISADVANTAGES OF DBMS Cost of Hardware and Software of a DBMSis quite high which increases the budget of your organization. Most databasemanagement systems are often complex systems,so the training for users to use the DBMSis required. In some organizations,all data is integratedinto a single database which can be damaged because of electric failure or database is corrupted on the storage media. Use of the same program at a time by many users sometimes lead to the loss of some data. DBMScan't perform sophisticatedcalculations