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...
...null,NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULl, NULL-- Можно использовать CAST
UNION ALL SELECT NULL, *, NULL, NULL FROM email. I understand what this does and why
Search this forum only. Display results as threads.
Очередной SQL Injection довольно массового характера Обнаружив на сайте урлы вида /album.phtml?id=340 бот злоумышленника предлагает php-шному коду к рассмотрению урлы формата например /album.phtml?id=999999.9+%2f**%2fuNiOn%2 f**%2faLl+%2f**%2f sElEcT+...
Логические операции и NULL. Обычно, состояние НЕИЗВЕСТНО обрабатывается так же, как ЛОЖЬ. Например, если вы выбираете строки из таблицы и вычисление условия x = NULL в предложении WHERE дало результат НЕИЗВЕСТНО, то вы не получите ни одной строки.
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.”
A null pointer constant, as Karlson's answer correctly states, is either an integer constant expression with the value 0 (a simple 0 is
n\u0103m 2017, f, consu, none, null, null, 0, null, no-message, manual, null, order, no, null, f, t, null, receive, no-message, empty, 10, null, null, null, null