The document provides an introduction to database management systems (DBMS) and database models. It defines key terms like data, database, DBMS, file system vs DBMS. It describes the evolution of DBMS from 1960 onwards and different database models like hierarchical, network and relational models. It also discusses the roles of different people who work with databases like database designers, administrators, application programmers and end users.

1. Intro to DBMS and its Models Name Roll Nos . Babli Kumari 02 D Gokul 11 Shraddha Labde 23 Ravikant Sharma 46 Prabhat Sinha 48

9. DBMS Architecture Plan Executor Optimizer Operator Evaluator Parser SQL Engine Recovery Manager Lock Manager Tx Manager Files & Access Buffer Manager Disk Space Manager DBMS Catalog Data File Database Web Forms Front-End SQL I/f SQL Commands

22. The Evolution of Data Models

31. Degrees of Data Abstraction - Summary

33. Hierarchical DB model

34. Hierarchical DB model

35. Example PARENT CHILD Emp No. First Name Last Name Dept Num 100 John Dougals 2A 101 Antony Wanton 2B 102 Mary Queen 2C 103 David Moorey 2D Serial No. Type User Emp No. 3009734-4 Computer 100 3-23-283742 Monitor 100 2-22-723423 Monitor 100 232342 Printer 100

38. Network DB model

51. Relational DB model

58. Index_no

64. Terminology Name Price Category Manufacturer gizmo $19.99 gadgets GizmoWorks Power gizmo $29.99 gadgets GizmoWorks SingleTouch $149.99 photography Canon MultiTouch $203.99 household Hitachi Tuples or rows or records Attribute names Table name or relation name Products:

65. Relational DB model