DBTyP.NET 2008 is high speed intuitive tool for visual cross database comparison and synchronization that performs both, structure and data comparisons of SQL Server, Oracle and MySQL databases.
CompareData is a native Windows cross-dbms application that allows you to visually compare and synchronize data between two SQL databases using ODBC drivers. You can retrieve all/some data for a table/view from two databases and compare the data visually to see differences highlighted on the screen. You can also compare the data of two sql queries
DatabaseBridge is a powerful cross-DBMS data migration, data comparison and distributed query tool that also performs validation of flat data and acts as a multi-DBMS browser. It is designed to work in a cross-DBMS, multiple data source environment and to serve a broad range of relational/non-relational data sources. It has exceptional data transfer speed. A cross-DBMS data transfer job of a million records can be completed in minutes.