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Outline:What is a Foreign key? Foreign key link between students and department table Create a parent table department Alter table command Add a new column to the existing students table How to add a Foreign key using Alter table command Foreign key violation error Advantages of using Foreign key Alter table alter column command Commonly used constraints
What is a Foreign key? Foreign key link between students and department table Create a parent table department Alter table command Add a new column to the existing students table How to add a Foreign key using Alter table command Foreign key violation error Advantages of using Foreign key Alter table alter column command Commonly used constraints
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