OLTP vs OLAP
Transactional vs analytical databases.
What Are OLTP and OLAP?
Databases are not one-size-fits-all. Two fundamentally different workloads have shaped how we design and operate databases: OLTP (Online Transaction Processing) and OLAP (Online Analytical Processing).
Understanding the difference is essential for any data professional. The right choice between OLTP and OLAP determines query speed, storage cost, and the overall architecture of your data system.
OLTP: Built for Transactions
OLTP systems handle a high volume of short, fast operations — inserts, updates, and deletes that reflect real-time business events. Examples include placing an order, processing a payment, or updating a customer record.
The key properties of OLTP are: low latency per operation, high concurrency, and strong consistency. Every transaction must be ACID-compliant to protect data integrity.
-- OLTP example: inserting a new order
INSERT INTO orders (customer_id, product_id, quantity, order_date)
VALUES (1042, 88, 3, CURRENT_DATE);
-- Immediately update inventory
UPDATE inventory
SET stock = stock - 3
WHERE product_id = 88;