Founding differences between the old and new database to update the old database

[Ragabash]

I have a problem about updating the old database. I sell a project to a company with old database but I can't update its database. I want a sql code that find the differences between the old end the new database to update the old database

[debasisdas]

are you trying to find out the fdifference between each and every record in all the table ?

why not simple replace the old database with new one.