Do Casting is required for precision mismatch - forum topic by Kiruthi

Hi,
please confirm casting is required for precision mismatch of same data type?
For example: I have table EMP having column Designation char(20) and I have another table EMPLOYEE having column Designation char(30). I would create view by UNION  these two tables EMP and EMPLOYEE but precision mismatch for column Designation. Please let me know casting is required here.
Thanks in advance!