RPAD
This will allows you to pad the right side of a column with any set of characters.
Syntax: rpad (string, length ,[ padding_char])
Ex:
select rpad('computer',15,'*'), rpad('computer',15,'*#') from dual;output
rpad('computer',15,'*')
------------------------
computer******* rpad('computer',15,'*#')
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computer*#*#*#*
Default padding character was blank space.