Concat function is not working - invalid number of arguments

Question

I have a table with two columns(Name, Occupation). I want to output the value in a format something like this.

Jane(A) 
Jenny(D) 
Julia(A)

Answer 1

This happens to be one reason why I prefer replace() over concat():

SELECT REPLACE(REPLACE('{Name} ({Occ})', '{Name}', Name'
                      ), '{Occ}', SUBSTR(Occupation, 1, 1)
              )

You can readily see the format of the string being created and easily change it. Also, REPLACE() converts arguments to the appropriate type (which Oracle does with string concatenation anyway).