DA0-002 Data Concepts and Environments Practice Question
Which THREE of the following are characteristics of a relational database?
⚠ Common exam trap
Many exam-takers confuse key-value stores or document databases with relational databases, especially when they hear terms like 'keys' or 'documents' in other contexts, but relational databases strictly use tables, rows, columns, and SQL.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enforces referential integrity through foreign keys
Relational databases enforce referential integrity through foreign keys, which ensure that relationships between tables remain consistent. A foreign key in a child table must match a primary key value in the parent table, preventing orphaned records and maintaining data integrity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enforces referential integrity through foreign keys
Why this is correct
Referential integrity ensures relationships.
- ✗
Stores data in key-value pairs
Why it's wrong here
Key-value is NoSQL.
- ✗
Supports NoSQL document storage
Why it's wrong here
NoSQL is not relational.
- ✓
Uses Structured Query Language (SQL) for data manipulation
Why this is correct
SQL is the standard language.
- ✓
Data is organized into tables with rows and columns
Why this is correct
Tables are fundamental to relational databases.
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