What Is an ER Diagram?
An entity-relationship diagram shows what things exist in a system and how they relate. Its real value is not documentation - it is that cardinality forces questions nobody asks until the data is wrong.
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January 20, 2026
13 min read
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7 articles tagged “database”
Clear tag filterAn entity-relationship diagram shows what things exist in a system and how they relate. Its real value is not documentation - it is that cardinality forces questions nobody asks until the data is wrong.
A migration is a versioned, repeatable change to a database structure. The interesting part is not writing them - it is running them against a live system without downtime or data loss.
PostgreSQL is the #1 most admired database used by 55.6% of professional developers. Master pgvector for AI, Supabase integration, performance tuning, RLS for multi-tenant SaaS, and advanced extensions.
A comprehensive guide to designing and building multi-tenant AI SaaS applications. Covers tenant isolation, shared vs dedicated AI models, data partitioning, usage-based billing, and scaling strategies.
Optimize PostgreSQL for production workloads. Learn query optimization, indexing strategies, connection pooling, and monitoring techniques for high-performance database applications.
Compare Supabase and Firebase for your next project. Analysis of features, pricing, developer experience, and when to choose each BaaS platform.
Master database scaling with proven strategies for handling growth. Learn read replicas, sharding, caching, and when to move beyond traditional RDBMS.
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