Many people confuse database migration with data migration. Data migration is transferring data from one storage type or file format to another. Database migration usually means moving an RDBMS from one server to another, or between different DBMS types.
A database running on one server for years may have grown far beyond the hardware specs it launched with. This pushes teams toward systems with more RAM, more CPU cores, and SSDs instead of HDDs — SSDs offer access speeds nearly 100x faster, which matters a lot for programs that access large amounts of data frequently. After setting up new hardware and OS, the main challenge becomes transferring the database with minimal downtime.
DBMS vendors release new versions frequently — minor upgrades are easy to apply with a patch, but major updates require a lot of work, and many DBAs postpone them as long as possible. Once a vendor stops supporting the current version, upgrading becomes inevitable.
In rarer cases, DBAs have to switch to an entirely new DBMS — MSSQL to MySQL, Oracle to MSSQL, FoxPro to Access. This is one of the toughest migrations, because you're not just migrating data but also triggers and stored procedures, which often require significant syntax changes (for example, PL/SQL in Oracle versus T-SQL in SQL Server).
It's a time-consuming migration requiring careful planning, and typically uses cross-database migration tools such as Microsoft's Export & Import Wizard, MySQL Workbench's Migration Wizard, or third-party tools like Data Loader. Some DBAs take an intermediate path — converting the source data to CSV/flat files first, then loading into the target — but this is slow for large databases and doesn't work well with RAW, LOB, or IMAGE columns.
The better choice is a tool that reads directly from the source database and migrates straight to the target.
Direct connections to source and target using the latest OLE DB Providers — many tools only support old ODBC drivers, which don't support the native Bulk Load method that's several times faster than conventional inserts.
Support for loading into already-existing tables with column mapping — invaluable when an export stops partway and you don't want to start over.
Native Bulk Load support for the target database, which is several times faster than conventional inserts.
The ability to generate SQL dump files in the target database's format.
One tool that meets all these criteria is Data Loader. Beyond the features above, it supports synchronization between cross databases — for example, keeping a MySQL table in sync with an MSSQL table, or an Oracle table with a MySQL table — and comes with its own scheduler to synchronize data automatically at set intervals.
Download Data Loader