how I can create check sum to validate no changes at int string pairs on table
You could just use the CHECKSUM function as it returns an INT.  Just put in the columns that you want to checksum against for those tables and it'll output the checksum value for those columns.  Here's an example from AdventureWorks2012 but this function has been around for quite a while.  In this case I've got columns from two tables as part of the single checksum function call.

select loginID, checksum(LoginID, JobTitle, ShiftID)
from HumanResources.employee
join HumanResources.EmployeeDepartmentHistory on employee.BusinessEntityID = EmployeeDepartmentHistory.BusinessEntityID
and EndDate is null