PostgreSQL vs MongoDB in the Same Product: When We Chose Each
1 min read
“Which database is better?” is the wrong question. The right one is which shape of data and which guarantees this feature needs.
I work across Rails + Postgres and document stores; this is how we decide, and how we avoid a two-DB nightmare.
What you'll learn
- When relational constraints and reporting win
- When documents and flexible schemas earn their cost
- Operational reality: two skill sets, two backup stories
Next steps
Don’t sync critical truth between databases without a very good reason.