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Database Administrator
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Data Modelling
Database Administrator
Data Modelling questions
10 questions on Data Modelling for database administrators, easiest first.
Easy
7
Purpose of a primary key
easy
Third normal form
easy
What a foreign key enforces
easy
Data type for money
easy
Gaps in auto-increment IDs
easy
Storing event times
easy
Rejecting bad values
easy
Medium
2
UNIQUE column with NULLs
medium
Deleting a customer takes seconds
medium
Hard
1
Random UUID keys slow down inserts
hard
