Best Result For : 999999.9 uNiOn aLl sElEcT cAsT 0x393133353134353632312e39 as char cAsT
Try to search 999999 9' union all select cast(0x393133353134353632312e39 as char) and '0'0 here.
Now you can chat with who search for : 999999.9 uNiOn aLl sElEcT cAsT
As a result, they just used `NULL values to populate those columns. the real confusion is in the
999999.9+union+all+select+%27R3DM0V3_hvj_injection',null
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).
A field with a NULL value is a field with no value. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this
union all select null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null
For a style value of NULL, NULL is returned. data_type determines the range.
In computer programming, a null-terminated string is a character string stored as an array containing the characters and terminated with a null character ('\0', called NUL in ASCII).