DETECT CHANGE IN ROWS FROM TWO TABLE having Same Columns USING T-SQL

Hi

How to DETECT CHANGE IN ROWS  FROM TWO TABLE having Same Columns USING T-SQL 

I have Source Data which comes from Veeva.

We take Source data and Update it using MDM process. ( only few records will be updated and others remain Same)

TASK: To capture the What is changed after MDM Process For Testing

Please kindly Help me.

Regards