select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database. If TYPE OF is used with a (VAR)CHAR type, its character.
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 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...
CHAR() (SM): SELECT CHAR(64) Переводит ASCII-код в соответствующий символ. 9. Оператор UNION С оператором UNION можно делать запросы к пересечению таблиц. В основном, вы можете отправить запрос, возвращающий значение из другой таблицы.
SELECT * FROM schedule WHERE IS NOT NULL.
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Coming to our discussion, NULL macro is defined as ((void *)0) in header files of most of the C compiler implementations.
IS NULL вернёт истину, если операнд имеет значение NULL и ложь, если он им не является.
Если честно я не понял почему у меня раньше работало с char? Какая то мистика, хотя вроде все понятно: в типе char - 1 символ = 1 байт, а у меня кодировка UTF-8 1 символ = 4 байта и по другому быть не может, но у меня ведь работало!!!