1  –  AS name

    Changes the name displayed in the print statement header. By
    default literal values have a blank header name and variables
    use their name as a header. If the header must include spaces or
    lowercase characters then use SET QUOTING RULES or SET DIALECT to
    enable delimited identifiers

2  –  EDIT_USING

    Syntax options:

    EDIT USING edit-string|EDIT USING domain-name

    Assigns an edit string for use when formatting the variable or
    literal value. If a domain name is specified then the EDIT STRING
    from the domain is used.

    This clause is only permitted for interactive SQL.

3  –  literal

    Specifies the values you want displayed to the user during
    execution of the command procedure. Enclose the character
    literals in single quotation marks.

4  –  variable

    Prints the contents of the specified variable.