Q7:7.1 List down three or more current principles of relationaldatabase. Write your answer in 200-250 words.7.2 Explain following types of database model in brief. Write youranswer in 200-250 words.a) Hierarchical database modelb) Object-Oriented Database

(7.1) Current Principles of Relational Databases (200-250 words) Relational databases are built on…

Answered: Q7: 7.1 List down three or more current…

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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A Choice the correct answer:- 1) Storing same data in many places is called a) iteration b) redundancy c) concurrency d) enumeration 2). Larchitectures are common for web applications a) One tier b) Two tiers c) Three tires d) Centralized 3) A state that satisfies the structure and constraints of a scheme is called state. a) invalid b) true c) real d) valid 4) The database state is called. of the schema. a) intension b) extension c) expansion d) definition 5). is the basic object of ER model which is a thing in real world. a) relation b) domain c) attribute d) entity 6) attributes can have more than one value. a) composite b) simple c) multi-valued d) single valued 7) The entity is represented in ER-diagrams by. a) oval b) rectangle c) double oval d) diamond 8). attribute values are used to identify each entity uniquely. a) complex b) unique c) characters d) key 9) The relationships are displayed as in ER-diagrams. a) rectangles b) ovals c) triangles d) diamonds 10) A weak entity type…
What benefits can object-oriented databases offer? Describe four object-oriented database examples.
Consider a database with the following tables: Using sql query or steps V Patient(PatientID. PatientName, NumberOfVisits) / Doctor(DoctorID. DoctorName) Appointment(AppID. DoctoriD, PatientID, Date, time) 1.Create a Schema called DR and Add Assign those tables to it.
Subject:database administration and management question: select a database like customer tb,employee tb and customer tb make a set of predicate generate minterm predicate and fragments and make a correctness rule of fragmentation
Suppose you are given the following requirements for a simple database for the National Hockey League (NHL): • There exists many teams in the NHL • Each team has a teamID, name, a city, a coach, and one or more players • Each player belongs to only one team • Each player has a playerID, name, a position (such as left wing or goalie), a skill level, and a set of zero or more injury records . An injury record has an injuryRecordID, a game, a player, and a description. • A game is played between two teams and has a gameID, a homeTeamID, an away TeamID, a date (such asMay 11th, 2017), a home team score, and an away team score. Construct a schema for this database and ensure all relationships cardinalities (1:1, 1:M, M:M) match the requirements above. Then, using this schema, write your Data Definition Language queries in SQL to be able to create these tables in SQLite. Ensure all relevant constraints (Primary Keys, Foreign Keys, NOT NULL, data types) are included. Submit both the schema…
112. The process of reading a database schema and producing a data model from that schema is known as: a. data modeling. b. database design. c. reverse engineering. d. None of the above is correct.
Q3. Suppose you are given the following business rules to form the basis for a database design. The database must enable the manager of a company dinner club to mail invitations to the club's members, to plan the meals, to keep track of who attends the dinners, and so on. Each dinner serves many members, and each member may attend many dinners. A member receives many invitations, and each invitation is mailed to many members. A dinner is based on a single entree, but an entree may be used as the basis for many dinners. For example, a dinner may be composed of a fish entree, rice, and corn. Or the dinner may be composed of a fish entree, a baked potato, and string beans. Because the manager is not a database expert, the first attempt at creating the database uses the structure shown in the table below: Attribute Name MEMBER_NUM MEMBER_NAME MEMBER_ADDRESS MEMBER_CITY MEMBER_ZIPCODE INVITE_NUM INVITE_DATE ACCEPT_DATE DINNER_DATE DINNER_ATTENDED DINNER_CODE DINNER_DESCRIPTION Sample Value…
Show clearly all working explaining detailly each step
Each of the database models should have one benefit and one downside, so list them all.
A taxi company would like to provide an online service for customers to book a trip and for taxi drivers to check their upcoming trips. A database needs to be created to store customer data (name, address, email, telephone number) and trip information (pick up and drop off address and pick up time and date). Furthermore, your database should contain driver information (name and license plate). Each trip must be assigned to exactly one driver (and trips for a driver must not overlap). Customers who are not registered yet need to register (providing their address, phone number, email address, and credit card information). A registered customer should be able to book a trip, i.e. provide the pick-up address and time as well as the drop-off address via a graphical user interface. Customers should also be able to view their trips and cancel them if needed. All these operations are only possible after a customer signs in (which means they must be registered). Each new trip must be confirmed…
Q. A person wants to create a database manegment system with forms and different views. He also wants to do mathematical operations to calculate the expense and profit of his company. Explain what type of database he should use for this purpose with languages that are used and their significance
A physical database can only be designed with certain inputs.A physical database can only be designed with certain inputs.

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Q7: 7.1 List down three or more current principles of relational database. Write your answer in 200-250 words. 7.2 Explain following types of database model in brief. Write your answer in 200-250 words. a) Hierarchical database model b) Object-Oriented Database