Aikesheng Open Source Community

May 6, 2019 · Databases

How MySQL Finally Supports CHECK Constraints and Why It Matters for Data Integrity

This article explains why MySQL lacked CHECK constraints for years, demonstrates the data quality issues caused by missing checks, shows how to work around them with unsigned types, and provides step‑by‑step examples of using the new CHECK constraint in MySQL 8.0.16+ while highlighting its absence in earlier versions.