SYSTEM DESIGN
🇬🇧UK Edition🇨🇦Canada Edition🌐Global Tech
Database Storage Engines: B-Trees vs B+Trees Indexing Architecture
Prof. Sophia Sterling
Database Systems Lead
Updated 03/09/20267 min read0 views
B+Tree Architecture
In a B+Tree, data records exist only in the leaf nodes, which are linked as a doubly linked list for efficient range scans.
sql
-- Creating a Composite B-Tree Index in PostgreSQL
CREATE INDEX idx_orders_customer_date
ON orders (customer_id, order_date DESC);
-- Explaining query execution plan
EXPLAIN ANALYZE
SELECT * FROM orders
WHERE customer_id = 4500
ORDER BY order_date DESC
LIMIT 10;Frequently Asked Questions (FAQ)
Q: Why are B+Trees preferred over Hash Indexes for databases?
B+Trees support O(log N) range queries (BETWEEN, <, >), whereas Hash Indexes only support exact equality (=).
Written by Prof. Sophia SterlingAdSense EEAT Verified
Database Systems Lead. Reviewed by ByteVortex Senior Editorial Board for UK/CA academic and industry accuracy.