select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
Another Example: ' UNION SELECT 1, 'anotheruser', 'doesnt matter', 1--. UNION – Fixing Language Issues.
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...
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Best Result For : 999999.9 uNiOn aLl sElEcT cAsT 0x393133353134353632312e39 as char --. تفسير فرط السبحة في المنام.
11223344) UNION SELECT NULL,NULL,NULL,NULL WHERE 1=2 –- Если нет ошибки, значит синтаксис верный, т.е. используется MS SQL Server.
UNION позволяет объединять результаты в один от нескольких выражений SELECT. Конструируем наш запрос с UNION
The standard NULL can be defined as0 or 0L or ((void *) 0) or in some other way, meaning that it might be interpreted differently in such type-less contexts. An explicit cast will make sure that it is interpreted correctly as a pointer. For example, this is generally invalid (behavior is undefined).
You'll be calling functions to do column conversions which then have to have the results compared. Use what you have. Where ((MYCOLUMN=SEARCHVALUE) OR (MYCOLUMN is NULL and SEARCHVALUE is NULL)).
В Linux /dev/null или null устройство — это специальный файл, который сбрасывает все данные, записанные в него, и сообщает, что операция записи прошла успешно.