c - Is (int *) 0 a null pointer? - Stack Overflow
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.
Confusing SQL error in SELECT NULL, *, NULL, NULL - Stack Overflow
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 displayed. That's not my question.
Replacing NULL with 0 in a SQL server query - Stack Overflow
When you want to replace a possibly null column with something else, use IsNull. SELECT ISNULL(myColumn, 0 ) FROM myTable.
Do you use NULL or 0 (zero) for pointers in... - Stack Overflow
Personally I still use the NULL value to represent null pointers, it makes it explicit that you're using a pointer rather than some integral
Нулевые указатели (null и nullptr) в C++ | Уроки С++ - Ravesli
Как и в случае с обычными переменными, указатели не инициализируются при создании. Если значение не было присвоено, то указатель по умолчанию будет указывать на любой адрес, содержимым которого...
sql injection "union select null" - CodeProject
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...
sql - MySQL SELECT only not null values - Stack Overflow
You should use IS NOT NULL. (The comparison operators = and <> both give UNKNOWN with NULL on either side of the expression.)
Шпаргалка по SQL инъекциям | DefconRU
Используйте NULL в UNION-инъекциях вместо попыток угадать строку, дату, число и прочее. Но будьте аккуратны при слепой
SQL ISNULL(), NVL(), IFNULL() and COALESCE() Functions
Suppose that the "UnitsOnOrder" column is optional, and may contain NULL values.
NULL pointer in C - GeeksforGeeks
It should be noted that NULL pointer is different from an uninitialized and dangling