5 Questions
What is the main concept of referential integrity?
It prevents adding records in a table that contain a foreign key, unless there is a corresponding primary key in the reference table.
Which of the following is NOT a rule of referential integrity?
Allow duplicate primary keys in the parent table.
What happens if you try to delete a primary key that has related foreign keys?
The deletion is not allowed, as it would violate referential integrity.
Which of the following statements is true about foreign keys?
A table can have multiple foreign keys referring to different primary keys.
What is the purpose of the rule "Do not add incompatible data to a child table"?
It ensures that all foreign keys in a table have matching primary keys in the parent table.
Learn the basic concepts of primary keys in a database. Understand what primary keys are, their rules, and the types of primary keys, including single primary keys. Discover how primary keys uniquely identify rows in a table.
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