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Home » Quiz » Data Modelling Quiz

The _______ constraint ensures that a column does not contain NULL values.

Difficulty level
  • CHECK
  • DEFAULT
  • NOT NULL
  • UNIQUE
The NOT NULL constraint ensures that a column does not contain NULL values. It is used to enforce data integrity by requiring each value in the specified column to be filled with valid data.
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Data Modelling Quiz
Quiz
What are the key differences between a superclass and a subtype in a Generalization and Specialization hierarchy?
The process of loading data into a Data Warehouse or Data Mart is known as _______.

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