问:
答:暂未回答
问:'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('t',2)='t
问:'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('c',0)='c
问:'and(select+1)>0waitfor/**/delay'0:0:2
问:'and(select+1)>0waitfor/**/delay'0:0:0