Difference
between
foreign key and primary key
(2 points each)
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Answer:ans is in the below figure
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Difference between foreign key and primary key is given below .
Explanation:
- The Primary key is used to find the unique record in the database database management system it is used to find unique record in the database management system whereas in the foreign key its value must match with primary key table column .
- Primary key never stored the NULL value whereas In foreign key it stored the NULL value .
- There is always one primary key in each table it may be possible more then one foreign key is present in particular table
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