sql - Counting null and non-null values in a single... - Stack Overflow
select sum(case when a is null then 1 else 0 end) count_nulls , count(a) count_not_nulls from us
Шпаргалка по SQL инъекциям | DefconRU
11223344) UNION SELECT NULL,NULL,NULL,NULL WHERE 1=2 –- Если нет ошибки, значит синтаксис верный, т.е. используется MS SQL
sql injection "union select null" - CodeProject
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...
Заметка про NULL / Хабр | select col from ttt where col is not null
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.
SQL Инъекции | Page 798 | ANTICHAT - Security online community
Version 5.1.49-3 User root@localhost. Code
COUNT, DISTINCT, and NULLs - SQL with Bert
returns non null values in group */ SELECT COUNT(Col1) FROM ##TestData; Because of this, COUNT, DISTINCT, and NULLs have a special relationship with each other that isn’t always as intuitive as many people think. Whenever using COUNT or DISTINCT, make sure to test with NULLs to make...
SQL injection bypass cheatsheet – All things in moderation
SQL Injection Bypass WAF Techniques. 1. Null Bytes. To perform a null byte attack, you simply need to supply a URL-encoded null byte (%00) prior to the string you want bypass blocking.
Внедрение SQL-кода — Википедия
-1 UNION SELECT group_concat(username, 0x3a, password) FROM admin.
Обработка значений NULL - ADO.NET | Microsoft Docs
Разрешение значений NULL в определениях столбцов вводит в приложение логику трех значений.Allowing null values in
SQL Server. Интересные советы | CONCAT_NULL_YIELDS_NULL
,ANSI_NULLS -- стандартизация сравнения с NULL. ,ANSI_WARNINGS -- вывод ошибок агрегации NULL и деления на 0.