How to check data from one database for presence in another in ruby?

Question

ruby

Hello everyone
There are two tables, in both the data is duplicated in the basis, but there are discrepancies. How to check for discrepancies in databases?
I use Ruby and MySQL, gem mysql2

Answer 1

Dump two databases and use some diff tool.
stackoverflow.com/questions/3840908/how-do-i-see-t...

Answer 2

The matter is that it is necessary for me in a section of certain conditions, such as date for example.
And plus, the structure of the tables in the databases is not the same