Understand migration types: Version upgrade (MySQL 5.7 → 8.0), database switch (MySQL → PostgreSQL), cloud migration (on-premise → AWS RDS)

Master migration phases: Assessment (compatibility analysis), planning (timeline, rollback), schema conversion (DDL mapping), data migration (ETL), testing (validation), cutover (zero-downtime)

Learn migration strategies: Big bang (single cutover), phased (gradual migration), parallel run (dual-write), blue-green (instant rollback)

Understand data migration: Full dump (mysqldump, pg_dump), incremental sync (CDC, triggers), validation (row counts, checksums, sample queries)

Master schema conversion: Data type mapping (INT → INTEGER, TEXT → VARCHAR), index conversion, stored procedure rewrite, constraint migration

Learn real-world migrations: GitLab (MySQL → PostgreSQL, 6 months), Uber (MySQL → PostgreSQL, MVCC), Stack Overflow (SQL Server upgrade, zero downtime)

Understand migration types: Version upgrade (MySQL 5.7 → 8.0), database switch (MySQL → PostgreSQL), cloud migration (on-premise → AWS RDS)

Master migration phases: Assessment (compatibility analysis), planning (timeline, rollback), schema conversion (DDL mapping), data migration (ETL), testing (validation), cutover (zero-downtime)

Learn migration strategies: Big bang (single cutover), phased (gradual migration), parallel run (dual-write), blue-green (instant rollback)

Understand data migration: Full dump (mysqldump, pg_dump), incremental sync (CDC, triggers), validation (row counts, checksums, sample queries)

Master schema conversion: Data type mapping (INT → INTEGER, TEXT → VARCHAR), index conversion, stored procedure rewrite, constraint migration

Learn real-world migrations: GitLab (MySQL → PostgreSQL, 6 months), Uber (MySQL → PostgreSQL, MVCC), Stack Overflow (SQL Server upgrade, zero downtime)