Mastering Constraints
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Questions and Answers

Which type of constraint is used to limit the range of values that can be entered in a column?

  • Check (correct)
  • Primary key
  • Unique
  • Not null

    • What is the preferred method of specifying constraints in this course, other than NOT NULL?

  • Primary key constraint
  • Foreign key constraint
  • Column constraint
  • Table constraint (correct)

    • What is the purpose of a foreign key constraint?

  • To combine NOT NULL and UNIQUE properties
  • To ensure a column may not have duplicate values
  • To ensure a field has a value
  • To reference a field in another table (correct)

    • What is the naming convention for a primary key constraint using the CONSTRAINT keyword?

    <p>&lt;table_name&gt;<em>&lt;field_name&gt;</em><abbreviation></p> Signup and view all the answers

    Why is it beneficial to use a named table constraint for primary keys?

    <p>It allows for more descriptive error messages when a constraint is violated</p> Signup and view all the answers

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