(5) Consider the ER diagram shown below, which shows a simplifiedschema for an airline reservations system. Extract from the ER diagramthe requirements (Entities, attributes, relationships, keys) andconstraints that produced this schema. Be as precise as possible inyour requirements and constraints specification.Airport codeCityStateNameDEPARTUREAIRPORTLeg noAIRPORTScheduled_dep_timeScheduled_arr_timeFLIGHT LEGNMARRIVALAIRPORTCANInstancesLEGSLANDNumberType nameMax_seatsINSTANCE_OFCompanyAirlineFLIGHTN.AIRPLANE_ΤΥΡEArr timeWeekdaysDEPARTSKARRIVESRestrictionsFARESNDep_timeAmountΤΥPECodeFAREAirplane_idTotal no_of_seatsNo of avail_seatsASSIGNEDLEG_INSTANCEQateAIRPLANECustomer_nameCphoneSeat noRESERVATIONNotes:1A LEG (segment) is a nonstop portion of a flightA LEG INSTANCE is a particular occurrenceof a LEG on a particular date.SEAT

These are the important term to design an ER diagram of any Database:- 1.ENTITY:-It is represented…

(5) Consider the ER diagram shown below, which shöWS schema for an airline reservations system. Extract from the ER diagram the requirements (Entities, attributes, relationships, keys) and constraints that produced this schema. Be as precise as possible in your requirements and constraints specification.

(5) Consider the ER diagram shown below, which shöWS schema for an airline reservations system. Extract from the ER diagram the requirements (Entities, attributes, relationships, keys) and constraints that produced this schema. Be as precise as possible in your requirements and constraints specification.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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IBased on the given case scenario, you will need to create an entity relation (E-R) diagram using the Crow's foot symbols that models the problem. This will include: Summarise the ERM's components, and names the entities and their relationship all entities, relationships (including names) and attributes that are relevant, primary keys identified, and include relationship participation - participation (optional / mandatory) symbols and cardinality. Case Study The following business rules are provided from the description of operations: A customer may request many charter trips. Each charter trip is requested by only one customer. Some customers have not (yet) requested a charter trip. Every charter trip is requested by at least one customer. An employee may be assigned to serve as a crew member on many charter trips. Each charter trip may have many employees assigned to it to serve as crew members. An employee may not yet have been assigned to serve as a crew member on…
Using your own words differentiate between concerns and constraints?
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1. List down the types of attributes in the Entity-Relationship (ER) model.
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Use an appropriate example to explain Entity Relationship Diagram.