Data Processing Practice Tests – Relational Models and Constraints in Database

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Data Processing Practice Tests – Relational Models and Constraints in Database


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The ______ constraint is use to create and retrieve data from the database very quickly.

A. INDEX      B. DEFAULT      C. UNIQUE      D. CHECK


The ______ constraint ensures that a column cannot have NULL value.

A. NOT NULL      B. DEFAULT      C. UNIQUE      D. none of the above


Rules that ensures the accuracy and reliability of the data in the database are known as ______

A. SQL      B. Entities      C. Attributes      D. Constraints


The following SQL commands are examples of the components of Data Definition Language EXCEPT ______

A. UPDATE      B. CREATE      C. ALTER      D. DROP


A column in a database table that is designed to maintain specific information about every record in the database table is known as _______

A. field       B. record      C. tables      D. SQL


 



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