Use the database shown in Figure P3.10 to work. Note that the database is composed of four tables that reflect these relationships: • An EMPLOYEE has only one JOB_CODE, but a JOB_CODE can be held by many EMPLOYEEs. • An EMPLOYEE can participate in many PLANs, and any PLAN can be assigned to many EMPLOYEEs. Note also that the M:N relationship has been broken down into two 1:M relationships for which the BENEFIT table serves as the composite or bridge entity 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.
Use the database shown in Figure P3.10 to work. Note that the database is composed of four tables that reflect these relationships: • An EMPLOYEE has only one JOB_CODE, but a JOB_CODE can be held by many EMPLOYEEs. • An EMPLOYEE can participate in many PLANs, and any PLAN can be assigned to many EMPLOYEEs. Note also that the M:N relationship has been broken down into two 1:M relationships for which the BENEFIT table serves as the composite or bridge entity 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.
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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Use the database shown in Figure P3.10 to work. Note that the database is composed of four tables that reflect these relationships:
• An EMPLOYEE has only one JOB_CODE, but a JOB_CODE can be held by many EMPLOYEEs.
• An EMPLOYEE can participate in many PLANs, and any PLAN can be assigned to many EMPLOYEEs.
Note also that the M:N relationship has been broken down into two 1:M relationships for which the BENEFIT table serves as the composite or bridge entity
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.
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