What is inventor2
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    What is inventor2 What is inventor2 Presentation Transcript

    • Presentation OnAirline Management System
    • Introduction The internet revolution of the late 1990s sharply increased directuser access to databases. Organisations converted many of their phone interfaces todatabases into web interfaces, and made a variety of servicesonline. Therefore, it is very easy to book tickets and find otherinformation online related to airlines online
    • Types of Inventory Raw materials Purchased parts and supplies Work-in-process (partially completed) products (WIP) Items being transported Tools and equipment
    •  This document gives a brief discussion on EntityRelationship in Airline Reservation System, one ofthe representative applicationparticular type can land on a particular airport on theof Database Management System which is used forreservations scheduled day
    • Objectives of Airline Management Maximize the level of customer service byproviding booking facility. It is very easy to book tickets and find otherinformation online related to airlines online.
    • DBMS Architecture It provides a frame work ,which is proposed asstandard by ANSI. Three views are1. External View2. Conceptual View3. Internal View
    • External ViewPassenger_ id Passenger_name Phone_no676 Harpreet Sidhu 9897685765984 Simranjeet Singh 9878654332Passenger_ id Passenger_name Address676 Harpreet Sidhu Delhi984 Simranjeet Singh Chandigarh
    • Conceptual ViewPassenger_ id NumberPassenger_ name TextAddress MemoPhone_no NumberGender Text
    • Internal View It is the view about the actual physicalstorage of data . This level describes ‘how’ the data will beactually stored in the database. This level serves as a base .
    • Entity Relationship Model Entity – It is anything real or abstract about which wewant to store the data . Relationship – It specifies the association thatexists between one or more entities. Attribute – It is the characteristic which is common toall or most instances of particular entity.
    • Entity Passenger Flight Time Fare Ticket Location
    • Attributes Characteristics of entities Domain is set of possible values Primary keys underlined
    • FlightPassengerFlight TimeRelationshipPassengerBookingBoardsMakesArrival
    • Flight TicketFareFlight LocationPassengerRelationshipPaysReachHas
    • Example Of ER Model
    • Generalization
    • StudentGrad Student Post Grad StudentSpecialization
    • Normalization It is a process during which redundant relationschemas are decomposed by breaking up theirattributes in to smaller relation schemas thatpossess desirable properties.1. First N/F2. Second N/F3. Third N/F4. BNC N/F
    • EliminateRepeatingGroupsSecond N/FFirst N/FThird N/FBC N/FRemovingPartial keydependencyEliminateTransitivekeydependencyEliminateFunctionaldependencyNormalization Form
    • SQL Commands It is a simple and powerful language used to create ,access andmanipulate data and structure in the database . SQL Statements categorize in to1. Data Definition Language ( CREATE, DROP, ALTER )2. Data Manipulation Language (INSERT INTO,UPDATE ,DELETE )3. Transaction Control Language4. Query Language ( SELECT)
    • ER-Diagram
    • Data Definition Language Define the structure of a database.Types of DDL commands Create Alter Drop Rename
    • Create Command The CREATE TABLE statement is used to create atable in a database.Syntax Example CREATE TABLE table_name(column_name1 data_type,column_name2 data_type,column_name3 data_type,....) ;CREATE TABLE Passenger(PassengerId number primary key,PassengerName text(20),Address varchar(50),Phone _no number(10)) ;
    • INSERT CommandThe INSERT INTO statement is used to insert a newrow in a table.SyntaxINSERT INTO table_nameVALUES (value1, value2, value3,...)INSERT INTO table_name (column1, column2, column3,...)VALUES (value1, value2, value3,...)OR
    • ExampleINSERT INTO PassengerVALUES (678,‘Harpreet Sidhu’, ‘Delhi, 9889765897);ORINSERT INTO Passenger (Passenger_Id, PassengerName)VALUES (678, ‘Harpreet Sidhu);
    • Alter CommandSyntaxALTER TABLE table_nameADD column_name datatypeExampleALTER TABLE table_nameDROP COLUMN column_nameALTER TABLE PassengerADD DateOfBirth dateALTER TABLE PassengerDROP COLUMN DateOfBirthExample
    • Drop The DROP TABLE statement is used todelete a table Syntax DROP TABLE table_name DROP DATABASE database_name