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Keys
Data Engineer
Keys questions
7 questions on Keys for data engineers, easiest first.
Easy
4
Primary key for order lines
easy
Several unique columns
easy
Picking the natural key
easy
GENERATED ALWAYS AS IDENTITY
easy
Medium
1
Hashing a business key for a surrogate
medium
Hard
2
Adding an id to an enrolment table
hard
Rebuilding a dimension renumbered keys
hard
