SQL-FUNDAMENTALS5 MIN READ
Use ORDER BY for promises, not decoration
Explain why LIMIT without ORDER BY is not a stable top-N query.
ORDER BY is the difference between a result set and a ranked answer. A table scan, an index scan, and a parallel plan can all produce valid but different row orders unless the query specifies one. This matters whenever stakeholders interpret position as meaning: latest events, biggest customers, first failed jobs, most recent invoices. Add a tie-breaker when equal metric values would otherwise make the order unstable.
Read the full lesson
Sign up free — one personalized lesson every day, matched to your role and goals.
Already have an account? Sign in