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Define the concept of entity integrity. Do the tables exhibit entity integrity? Answer yes or no and then explain your answer. Define the concept of referential integrity. Do the tables exhibit referential integrity? Answer yes or no and then explain your answer. Write NA (Not Applicable) if the table does not have a foreign key  Create an ERD based on the Crow’s Foot model, using the database tables in Figure 1. Show the relationship's strength (weak or strong)

Define the concept of entity integrity. Do the tables exhibit entity integrity? Answer yes or no and then explain your answer. Define the concept of referential integrity. Do the tables exhibit referential integrity? Answer yes or no and then explain your answer. Write NA (Not Applicable) if the table does not have a foreign key  Create an ERD based on the Crow’s Foot model, using the database tables in Figure 1. Show the relationship's strength (weak or strong)

Database System Concepts
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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  1. Define the concept of entity integrity. Do the tables exhibit entity integrity? Answer yes or no and then explain your answer.
  2. Define the concept of referential integrity. Do the tables exhibit referential integrity? Answer yes or no and then explain your answer. Write NA (Not Applicable) if the table does not have a foreign key
  3.  Create an ERD based on the Crow’s Foot model, using the database tables in Figure 1. Show the relationship's strength (weak or strong)

 

Table TRUCK TRUCK_NUM BASE_CODE TYPE_CODE TRUCK_MILES TRUCK_BUY_DATE TRUCK_SERIAL_NUM 23-Sep-07 AA-322-12212-W11 05-Feb-06 AC-342-22134-Q23 11-Nov-06 AC-445-78656-Z99 06-Jan-07 VQ-112-23144-T34 01-Mar-06 FR-998-32245-W12 15-Jul-03 AD-456-00845-R45 17-Oct-04 AA-341-96573-Z84 07-Aug-05 DR-559-22189-D33 12-Feb-08 DE-887-98456-E94 1001 1002 1003 1004 1005 1006 1007 1008 1009 501 502 501 503 501 502 502 503 Table BASE BASE_CODE BASE_CITY 501 Murfreesboro 502 Lexington TN KY 503 Cape Girardeau MO 504 Dalton GA Table TYPE 1 1 2 1 2 2 3 3 2 BASE_STATE 32123.5 76984.3 12346.6 2894.3 45673.1 193245.7 32012.3 44213.6 10932.9 TYPE_CODE TYPE_DESCRIPTION 1 Single box, double-axle 2 Single box, single-axle 3 Tandem trailer, single-axle BASE_AREA_CODE 615 568 456 901 | BASE_PHONE BASE MANAGER Andrea D. Gallager George H. Delarosa Maria J. Talindo Peter F. McAvee 123-4567 234-5678 345-6789 456-7890
Transcribed Image Text:Table TRUCK TRUCK_NUM BASE_CODE TYPE_CODE TRUCK_MILES TRUCK_BUY_DATE TRUCK_SERIAL_NUM 23-Sep-07 AA-322-12212-W11 05-Feb-06 AC-342-22134-Q23 11-Nov-06 AC-445-78656-Z99 06-Jan-07 VQ-112-23144-T34 01-Mar-06 FR-998-32245-W12 15-Jul-03 AD-456-00845-R45 17-Oct-04 AA-341-96573-Z84 07-Aug-05 DR-559-22189-D33 12-Feb-08 DE-887-98456-E94 1001 1002 1003 1004 1005 1006 1007 1008 1009 501 502 501 503 501 502 502 503 Table BASE BASE_CODE BASE_CITY 501 Murfreesboro 502 Lexington TN KY 503 Cape Girardeau MO 504 Dalton GA Table TYPE 1 1 2 1 2 2 3 3 2 BASE_STATE 32123.5 76984.3 12346.6 2894.3 45673.1 193245.7 32012.3 44213.6 10932.9 TYPE_CODE TYPE_DESCRIPTION 1 Single box, double-axle 2 Single box, single-axle 3 Tandem trailer, single-axle BASE_AREA_CODE 615 568 456 901 | BASE_PHONE BASE MANAGER Andrea D. Gallager George H. Delarosa Maria J. Talindo Peter F. McAvee 123-4567 234-5678 345-6789 456-7890
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