T
testnet
Unregistered / Unconfirmed
GUEST, unregistred user!
select emp_no, first_name, last_name from employee where
emp_no >= :low_no or emp_no <= :high_no
通过
select emp_no, first_name, last_name from employee where
emp_no >= :low_no and emp_no <= :high_no
不能通过
emp_no >= :low_no or emp_no <= :high_no
通过
select emp_no, first_name, last_name from employee where
emp_no >= :low_no and emp_no <= :high_no
不能通过