Bài toán LCA

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

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wnr86tDA')) OR 63=(SELECT 63 FROM PG_SLEEP(15))--

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

UwwV1nqd') OR 704=(SELECT 704 FROM PG_SLEEP(15))--

-1)) OR 272=(SELECT 272 FROM PG_SLEEP(15))--

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-5) OR 508=(SELECT 508 FROM PG_SLEEP(15))--