KV KAUSANI CLASS – XII A

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MYSQL REVISION-I (2021-22)

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Enter Your Name

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Enter your email ID

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What is difference between  UNIQUE and PRIMARY KEY constraint.

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Difference between Char and Varchar Datatype.

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A table has 4 tuples and 5 attributers. Later on 2 more tuples are added and 1 attribute is removed from it. What is the Degree and cardinality of the table after modification.

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What is the importance of Foreign Key in a database?

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  1. Difference between Primary and Candidate Key with example.

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