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Entity Relationship Diagram: Weak Entity

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Nicole Gaehle, MSIST

To create a weak entity on an entity relationship diagram

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Weak Entity ERD By: Nicole Gaehle and Leah Kinnamon This is a weak entity because a portion of the primary key is made up of a parent entity primary key. EMPLOYEE PK EMP_NUM LNAME FNAME CONTACT ADDRESS CITY STATE ZIP DEPARTMENT PK DEPT_NAME DEPT_LOCATION DEPT_PHONE TEAMS PK, FK1 DEPT_NAME PK, FK2 EMP_NUM belongs in contains many

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Entity Relationship Diagram: Weak Entity

  • 1. Weak Entity ERD By: Nicole Gaehle and Leah Kinnamon This is a weak entity because a portion of the primary key is made up of a parent entity primary key. EMPLOYEE PK EMP_NUM LNAME FNAME CONTACT ADDRESS CITY STATE ZIP DEPARTMENT PK DEPT_NAME DEPT_LOCATION DEPT_PHONE TEAMS PK, FK1 DEPT_NAME PK, FK2 EMP_NUM belongs in contains many