Are you looking for a tool which can help you compare the content of two databases like table data, read further to find the solution which is easy to use and understand and most importantly available for free trial.
SQL Data Compare
This is a tool provided by RedGate and available for free trial however to use it for long time you need to purchase a licence.
SQL Data Compare is the industry-standard tool for comparing and deploying SQL Server database contents.
You can work with live databases, backups, or SQL scripts in source control. Damaged or missing data can be restored to a single row, without the need for a full database recovery.
SQL Data Compare helps you compare and deploy changes quickly, simply, and with zero errors.