INTERVIEW QUESTIONS DATABASE SQL SERVER DETAILS

Question: When do you get constraint violation? What are the types of constraints?

Answer: Database returns an error message when a constraint is violated.

Differnet type of constrains;

1.Domain Constraints:A Domain constraint deals with one or more columns

2.Entity Constraints

3.Referential Integrity Constraints.

4.Key Constraints

4.1.Primary Key Constraints

4.2 Foreign Key Constraints

4.3 Unique key Constraints

4.4 Check constraint

4.5 Default constraint

Database returns an error message when a constraint is violated.

Differnet type of constrains;

1.Domain Constraints:A Domain constraint deals with one or more columns

2.Entity Constraints

3.Referential Integrity Constraints.

4.Key Constraints

4.1.Primary Key Constraints

4.2 Foreign Key Constraints

4.3 Unique key Constraints

4.4 Check constraint

4.5 Default constraint
Source: CoolInterview.com

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