Table name: EMPLOYEEEMP_NUM EMP_LNAME215 Smith216 Romero217 Randall218 AardenTable name: EMP_EDUCEMP_NUM EDU_CODE EE_YEAR215 842002215 HS1991215 JC1994216 B41989216 CDP2004216 CNP2002216 HS1985217 HS1992217 JC2000218 B41990218 CDP2000218 CNP2005218 HS1984218 M21995TABLEEMPLOYEEEDUCATIONTable name: EDUCATIONEDU_CODEEDU_DESCRIPTIONa) For each table in the database, identify the primary key and the foreign key(s). If a table does nothave a foreign key, write None in the space provided.EMP_EDUC34CDPCNPCPADRHSJCM2Bachelor's degreeCertified data ProcessingCertified Network ProfessionalCertified Public AccountantEarned Doctorate degreeHighschool diplomaPRIMARY KEY(s)Junior College degreeMaster's degreeFOREIGN KEY(s)

below is the primary key and forgain key for all 3 tables.

Table name: EMPLOYEE EMP_NUM EMP_LNAME 215 Smith 216 Romero 217 Randall 218 Aarden Table name: EMP_EDUC EMP_NUM EDU_CODE EE_YEAR 215 84 2002 215 HS 1991 215 JC 1994 216 B4 1989 216 CDP 2004 216 CNP 2002 216 HS 1985 217 HS 1992 217 JC 2000 218 B4 1990 218 CDP 2000 218 CNP 2005 218 HS 1984 218 M2 1995 Table name: EDUCATION EDU_CODE EDU_DESCRIPTION 34 CDP CNP CPA DR HS JC M2 Bachelor's degree Certified data Processing Certified Network Professional Certified Public Accountant Earned Doctorate degree Highschool diploma Junior College degree Master's degree a) For each table in the database, identify the primary key and the foreign key(s). If a table does not have a foreign key, write None in the space provided.

Table name: EMPLOYEE EMP_NUM EMP_LNAME 215 Smith 216 Romero 217 Randall 218 Aarden Table name: EMP_EDUC EMP_NUM EDU_CODE EE_YEAR 215 84 2002 215 HS 1991 215 JC 1994 216 B4 1989 216 CDP 2004 216 CNP 2002 216 HS 1985 217 HS 1992 217 JC 2000 218 B4 1990 218 CDP 2000 218 CNP 2005 218 HS 1984 218 M2 1995 Table name: EDUCATION EDU_CODE EDU_DESCRIPTION 34 CDP CNP CPA DR HS JC M2 Bachelor's degree Certified data Processing Certified Network Professional Certified Public Accountant Earned Doctorate degree Highschool diploma Junior College degree Master's degree a) For each table in the database, identify the primary key and the foreign key(s). If a table does not have a foreign key, write None in the space provided.

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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Concept explainers

SQL

SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.

Queries

A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.

Question

Table name: EMPLOYEE
EMP_NUM EMP_LNAME
215 Smith
216 Romero
217 Randall
218 Aarden
Table name: EMP_EDUC
EMP_NUM EDU_CODE EE_YEAR
215 84
2002
215 HS
1991
215 JC
1994
216 B4
1989
216 CDP
2004
216 CNP
2002
216 HS
1985
217 HS
1992
217 JC
2000
218 B4
1990
218 CDP
2000
218 CNP
2005
218 HS
1984
218 M2
1995
TABLE
EMPLOYEE
EDUCATION
Table name: EDUCATION
EDU_CODE
EDU_DESCRIPTION
a) For each table in the database, identify the primary key and the foreign key(s). If a table does not
have a foreign key, write None in the space provided.
EMP_EDUC
34
CDP
CNP
CPA
DR
HS
JC
M2
Bachelor's degree
Certified data Processing
Certified Network Professional
Certified Public Accountant
Earned Doctorate degree
Highschool diploma
PRIMARY KEY(s)
Junior College degree
Master's degree
FOREIGN KEY(s)

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