select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
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...
11223344) UNION SELECT NULL,NULL,NULL,NULL WHERE 1=2 –- Если нет ошибки, значит синтаксис верный, т.е. используется MS SQL Server.
The NULL macro is required to expand to "an implementation-defined null pointer constant". A null pointer constant is defined as "An integer constant expression with the value 0, or such an expression cast to type void *". Counterintuitively, this definition does not require the expansion of NULL to be an...
0x2char.py - Заменить каждую (MySQL) 0x<шестнадцатеричную> кодированную строку на эквивалентный CONCAT(CHAR(),…) двойник. apostrophemask.py - Заменить символ апострофа (') на его UTF-8 full width аналог (то есть '
NULL в языках программирования Си и C++ — макрос, объявленный в заголовочном файле stddef.h (и других заголовочных файлах).
Чем опасен NULL? Сравнение NULL с любым другим значением, даже с родственным (в большинстве языков программирования, в частности, в
The jvalue union type is used as the element type in argument arrays. It is declared as follows
The macro NULL is a null-pointer constant and has either an integer type or a pointer type. Using NULL to assign or initialize a non-pointer variable will lead to question marks from other programmers at the least and it might result in compiler failures. A line like.