Every database migration has a story. And after enough Oracle and SQL Server projects landing on PostgreSQL, one pattern keeps repeating: the things that sink a migration are rarely the big, obvious ones. They're the small, quiet decisions made early - the ones that look harmless in a test environment and only reveal their real cost once the system is live and under load. Here's the most underrated one of all that we also presented in pgmumbai meetup at Google with our custom

Migrating from Oracle to PostgreSQL? Don’t just convert as per Tools default. This guide covers essential DDL considerations like NUMBER mapping, partitioning differences, PK/FK mismatches, and boolean transformation to help you build a stable PostgreSQL schema.