SQL -Constraints

Published: 12 December 2020
on channel: Coding Christi -Python, Java, SQL
1,770
35

Review Questions:
1. What are constraints?
2. How can you create a primary key?
3. How can you create a foreign key?
4. How can you mark an attribute to be unique?
5. How can you make sure no one insert a null value in a certain column of your table?
6. Explain check constraint.
7. Explain default constraint.


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