KS DB Merge Tools
for MS Access
aka AccdbMerge
for SQL Server
aka MssqlMerge
for MySQL
and MariaDB
for SQLite
for PostgreSQL

Data changes summary

Open databases (see Schema changes summary use case) and 1click 'Batch data diff' toolbar button:

In the opened Batch data diff tab choose 2calculation type, 3whether you want to process tables or views of both and 4click Run:

Wait for a progress and you'll get the result:

Then you can 5apply filter to show only tables/views with changed data: