To print out the last word in the string:
SQL> declare 2 v1_tx VARCHAR2(20):='Hello to everybody'; 3 v2_tx VARCHAR2(20); 4 begin 5 v2_tx:= substr (v1_tx, instr (v1_tx,' ',-1)+1); 6 DBMS_OUTPUT.put_line(v2_tx); 7 end; 8 / everybody PL/SQL procedure successfully completed. SQL>