Comparing data across systems in sap

How can we compare data across different systems?

Use the Transaction code SCMP to compare the tables. You need an RFC connection for the comparison server client.

Parameters for this Tcode are:
View/Table: Please give the Table name which you want to compare.
R/3 Connection: Give the RFC connection name (Use F4).

...then there are some options, select the options to meet your requirement