-- https://docs.oracle.com/en/database/oracle/oracle-database/23/lnpls/plsql-language-fundamentals.html
DECLARE
  name     VARCHAR(25) NOT NULL := 'Smith';
  surname  name%TYPE := 'Jones';
BEGIN
  DBMS_OUTPUT.PUT_LINE('name=' || name);
  DBMS_OUTPUT.PUT_LINE('surname=' || surname);
END;
/