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sql injection "union select null" - CodeProject | To display as

www.codeproject.com

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...

NULL pointer in C - GeeksforGeeks

www.geeksforgeeks.org

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.”

c - Is (int *) 0 a null pointer? - Stack Overflow

stackoverflow.com

If a null pointer constant is converted to a pointer type, the resulting pointer, called a null pointer, ... which covers (int *)0 as null pointer since cast is an

Заметка про NULL / Хабр | select col from ttt where col is not null

habr.com

IS NULL вернёт истину, если операнд имеет значение NULL и ложь, если он им не является.

NULL (Си) — Википедия

ru.wikipedia.org

NULL в языках программирования Си и C++ — макрос, объявленный в заголовочном файле stddef.h (и других заголовочных файлах). Значением этого макроса является зависящая от реализации константа нулевого указателя (англ. null pointer constant).

SQL ISNULL(), NVL(), IFNULL() and COALESCE() Functions

www.w3schools.com

SQL NULL Functions.

The SQL Injection Knowledge Base | Tables and Columns

www.websec.ca

SELECT username FROM Users WHERE id = '-1' UNION SELECT MID(GROUP_CONCAT(0x3c62723e

6.7a — Null pointers | Learn C++

www.learncpp.com

} In the likely case where NULL is defined as value 0, print(NULL) will call print(int), not print(int*) like you might expect for a null pointer literal.

SQL ISNULL(), NVL(), IFNULL() and COALESCE() Functions

www-db.deis.unibo.it

SQL NULL Functions.

Обработка значений NULL - ADO.NET | Microsoft Docs

docs.microsoft.com

NULL не является ни пустой строкой (для типов данных character или datetime), ни

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999999.9" /union/all /select /)/**/union/**/all/**/select/**/null,null,null,null,null,null,null,null,null--/**/mssg/cast(0x393133353134353632312e39 as char),/cast(0x393133353134353632322e39 as char) and "0" на YouTube:

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