Best Result For : 999999.9 uNiOn aLl sElEcT cAsT 0x393133353134353632312e39 as char cAsT
Note: A NULL value is different from a zero value or a field that contains spaces.
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 all select null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null
First 25 Users Free. MySQL: Typecasting NULL to 0.
In general, every NULL value is taken into account to vary from each alternative NULL in the database.
Предикат IS NULL позволяет проверить отсутствие (наличие) значения в полях таблицы. Использование в этих случаях обычных предикатов сравнения может привести к неверным результатам, так как сравнение со значением NULL дает результат UNKNOWN (неизвестно).
The null character (also null terminator or null byte) is a control character with the value zero. It is present in many character sets, including ISO/IEC 646 (or ASCII), the C0 control code, the Universal Coded Character Set (or Unicode), and EBCDIC.
I do not want to show revords with null values in any column i only want to only records with data in all column. How can i set that. Please help.
Оператор объединения с NULL ?? возвращает значение своего операнда слева, если его значение не равно null.