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Write the similarity and difference between primary key and unique constraint

Posted by Sahil Varpe 4 years, 3 months ago

CBSE > Class 12 > Informatics Practices

1 answers

Yogita Ingle 4 years, 3 months ago

Similarity: Column with both the constraints will only take unique values.
Difference: Column with Primary key constraints will not be able to hold NULL values while Column with Unique constraints will be able to hold NULL values.

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