How to verify if two tables have exactly the same data?

Question

Basically, we have one table (original table) and it is backed up into another table (backup table); thus the two tables have exactly the same sche

Answer 1

You can just use CHECKSUM TABLE and compare the results. You can even alter the table to enable live checksums so that they are continuously available.

CHECKSUM TABLE original_table, backup_table;

It doesn't require the tables to have a primary key.