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dallaslu 这是在开玩笑么?
select * from user where username='v2ex' and password='235512'
select * from user where password='235512' and username='v2ex'
select * from user where password = '235512' and username = 'v2ex'
select * from user where password = '235512' and username = 'v2ex'
select *
from user
where password = '235512' and username = 'v2ex'
Select * from user where username='v2ex' and password='235512'
sElect * from user where username='v2ex' and password='235512'
....
select * from user where username='v2ex' anD password='235512'
select * from user where password = '235512' and 1=1 and username = 'v2ex'
select * from user where password = '235512' and 1=1 and 0=0 and username = 'v2ex'