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 works can somebody help me...
11223344) UNION SELECT 1,NULL,NULL,NULL WHERE 1=2 –- Если нет ошибки, значит первый столбец является числом.
ReferenceEquals already handles the case when both arguments are null — MSDN states "true if objA is the same instance as objB or if both are null; otherwise, false." regarting its return value.
Searches web pages, images, PDF, MS Office and other file types in all the major languages, and includes advanced search features, news, maps and other services.
Example: (MySQL): SELECT * from table where id = 1 union select 1,2,3 Example: (PostgreSQL): SELECT * from table where id = 1; select 1,2,3. Bypassing WAF: SQL Injection - Normalization
Хотите сохраните это видео? Войдите в аккаунт и добавьте его в плейлист.
Специальное значение NULL означает отсутствие данных, констатацию того факта, что значение не��зв��стно.
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