A practical guide to how databases work, covering schema design, SQL, indexing, transactions, concurrency, caching, pagination, and database selection.
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'Safe query space' lets AI fix SQL errors without starting over
"Find the best-selling product from last year." When an AI system attempts to answer a question like this by querying a company database, even a single reference to a nonexistent item can cause the ...
Dubbed PostGREShell, CVE-2026-6471 turns low-level replication access into code execution, permanent superuser privileges and a persistent database backdoor. PostgreSQL releases since 2014 contain a ...
PostgreSQL CASE statements make it possible to add conditional logic directly into SQL queries, working similarly to IF ELSE statements in programming languages and spreadsheet tools. This tutorial ...
Relational databases enforce schemas and ACID properties for data integrity, while non-relational databases offer flexible data models for unstructured content and rapid schema evolution at scale.
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