Database

A database is a system for storing large volumes of structured data with efficient search, update, and management capabilities. Relational databases (MySQL, PostgreSQL) and NoSQL databases (MongoDB, DynamoDB) are the main types. In QR code operations, databases are essential for dynamic QR management, scan analytics, and traceability data.

Dynamic QR management systems store code IDs, creation dates, redirect URLs, scan counts, and last scan timestamps. Each scan queries the database for the redirect destination while logging scan details (time, region, device). High-volume services handle millions of daily scans, requiring fast read performance.

For traceability, databases store manufacturing history, quality inspection results, and distribution routes per product. QR codes typically store only a database record identifier (serial number), with detailed information retrieved from the server-side database on scan. This allows information updates without reprinting codes.