What are Database Compare Tools?
A database compare tool is a tool that identifies and synchronize data and/or database object changes between two databases.
A database object compare tool provides an easy way for developers and DBAs to compare databases schemas and propagate schema changes from one environment to another.
A database data compare tool allows you to compare and synchronize data in tables across servers and databases
Most vendors/tools support comparison of data and database objects. Sometimes combined in one tool.