In relational databases, what is a column that uniquely identifies each row/record in a table called?
APrimary Key
BUnique Index
CCandidate Key
DForeign Key
Explanation
A Primary Key is a database column (or set of columns) that uniquely identifies each individual record/row in a relational database table. Primary key values must be completely unique and cannot contain NULL values.
Exam Relevance
- Topic: Computer Fundamentals, Networking & Cybersecurity
- Subtopic: Hardware, MS Office, Protocols, Operating Systems & AI
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