PostgreSQL Home

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PostgreSQL Home

PostgreSQL is a powerful, open-source object-relational database system with over 35 years of active development, earned for reliability, feature robustness, and performance.

01

PostgreSQL Home (What is PostgreSQL?)

CONCEPT OVERVIEW
  • PostgreSQL implements MVCC (Multi-Version Concurrency Control) to handle concurrent read-write locks.
  • Exposes rich relational schemas, custom data types, and transactional DDL capabilities.
  • Enterprise engine supporting ACID compliance standards and complex query optimizations natively.
-- Create a table with JSONB column
CREATE TABLE shop_items (
    id serial PRIMARY KEY,
    details jsonb
);

-- Insert data and query nested fields
INSERT INTO shop_items (details) VALUES 
('{"name": "Poke Ball", "price": 200, "attributes": ["catch"]}');

SELECT details->>'name' AS item_name FROM shop_items 
WHERE (details->>'price')::int <= 300;

Interactive Practice Exercise

Which index type is best suited for searching nested keys inside JSONB columns?

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