Database Management Systems (DBMS)
Select the accurate description of Composite key.
Difficulty: Medium
- A. A subset of SQL commands used to define and modify database structures, such as CREATE and ALTER.
- B. A key formed by combining two or more columns to uniquely identify a row in a table. ✓
- C. A large, centralized repository of integrated data from multiple sources used for reporting and analysis.
- D. A precompiled collection of SQL statements stored in a database that can be executed as a single unit.
Correct answer
B. A key formed by combining two or more columns to uniquely identify a row in a table.
Correct answer
Source: Database Management Systems (DBMS) Official Reference Guide
Tags: computer science, dbms, SQL, databases
Submitted by: MCQsHub Editorial
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