btw: For instance, if a columnname contains a full stop or a slash you have set the name in backticks ``! Then it works
My recommendation: don't do it!
Choose a different name instead, you will save yourself a lot of trouble!
Additionally the SQL with the backtick is not portable. You will have a hard time if you need to run that on a DBMS that uses ANSI quoting. The standard for quoting names with special characters is the double quote, e.g "some.column"