Definition of primary key
Definition of primary key
Jan 14, 2020
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What Is a Primary Key? | IBM
What Is a Primary Key? | IBM
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How to add primary key constraint in Sequelize
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Learn SQL: Primary Key
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What is a Primary Key? - Definition from WhatIs.com
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Q1.Answer the following:(10)a. Is it mandatory for a foreign key to be a primary key in another table?b. Can foreign keys be null values in child relation?c. After enforcing foreign key constraint using on delete cascade rule, can you delete therecord in the child relation whose foreign key is not null before deleting the record in theparent relation?d. Can foreign keys have the duplicate values?e. Can there exist more than one foreign key in relation?Q2. Create fully normalized ERDs with primar
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