Which constraint ensures that an entity belongs to only one subclass?
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Which of the following best defines an Entity in a database…
Which of the following best defines an Entity in a database context?
What does the GROUP BY clause do in SQL?
What does the GROUP BY clause do in SQL?
What is the role of the INFORMATION_SCHEMA in a database cat…
What is the role of the INFORMATION_SCHEMA in a database catalog?
What is a tuple in a relational database?
What is a tuple in a relational database?
Which of the following SQL constraints ensures that a colum…
Which of the following SQL constraints ensures that a column’s values are always unique and cannot be NULL?
The LIKE operator is case-sensitive in MySQL by default.
The LIKE operator is case-sensitive in MySQL by default.
Which operator is used in SQL to match string patterns?
Which operator is used in SQL to match string patterns?
In an Enhanced Entity-Relationship (EER) model, what best de…
In an Enhanced Entity-Relationship (EER) model, what best describes a Union Type (Category)?
Which type of attribute cannot be divided further?
Which type of attribute cannot be divided further?