PostgreSQL - Advanced Features
Which PostgreSQL feature allows you to store and query hierarchical data efficiently?
Which PostgreSQL feature allows you to store and query hierarchical data efficiently?
easy📝 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand hierarchical data storage
Hierarchical data requires recursive queries to traverse parent-child relationships.Step 2: Identify PostgreSQL feature for recursion
Common Table Expressions (CTEs) support recursive queries, ideal for hierarchical data.Final Answer:
Common Table Expressions (CTEs) -> Option AQuick Check:
Hierarchical data query = CTEs [OK]
Quick Trick: Use CTEs for recursive hierarchical queries in PostgreSQL [OK]
Common Mistakes:
- Confusing JSONB with hierarchical query support
- Thinking Full Text Search handles hierarchy
- Assuming Materialized Views store hierarchy
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