10일 20일 30일 1 dbms_pipe.receive_me 2 2 OR 2 3 1 2 4 1123 2 5 dbms_pipe.receive_messagea20123 8 6 SLEEP20123 5 7 WAITFOR 1 8 dbms_pipe.receive_me123 4 9 PG_SLEEP20 4 10 PG_SLEEP20123 1 11 WAITFOR123 3 12 dbms_pipe.receive_messagea20 5 13 OR123 5 14 SLEEP20 4 1 dbms_pipe.receive_me 2 2 OR 2 3 1 1 4 1123 6 5 WAITFOR 4 6 PG_SLEEP20 1 7 SLEEP20123 2 8 dbms_pipe.receive_messagea20123 9 PG_SLEEP20123 2 10 dbms_pipe.receive_me123 1 11 dbms_pipe.receive_messagea20 1 12 OR123 1 13 SLEEP20 7 14 WAITFOR123 1 dbms_pipe.receive_me 3 2 OR 3 3 WAITFOR 2 4 1 2 5 PG_SLEEP20 2 6 PG_SLEEP20123 7 1123 3 8 SLEEP20 1 9 dbms_pipe.receive_messagea20123 10 SLEEP20123 2 11 dbms_pipe.receive_me123 3 12 OR123 13 WAITFOR123 14 dbms_pipe.receive_messagea20 3 11위 - 20위