SQL using If Not Null on a Concatenation - Stack Overflow
Since a NULL concatenated with a string yields a NULL, we can attempt to build our sub-string and replace a NULL with an empty string, which is then concatenated to the next part of the name. This assumes that FirstName and Surname are always NOT NULL, but you could apply the same logic to...
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...
select - Oracle: How to count null and non-null rows - Stack Overflow
count(case when a is null and b is null then 1 end) nb_a_and_b_null FROM my_table.
Confusing SQL error in SELECT NULL, *, NULL, NULL - Stack Overflow
UNION ALL SELECT NULL, *, NULL, NULL FROM email. I understand what this does and why; the hacker needs to create a query that has the same number
PayloadsAllTheThings/MySQL Injection.md at master...
select `4` from (select 1,2,3,4,5,6 union select * from users)dbname; Injection example inside the query select author_id,title from posts where
Шпаргалка по SQL инъекциям | DefconRU
(M): SELECT CONCAT(login, password) FROM members. 7. Строки без кавычек Есть несколько способов не использовать кавычки в запросе, например с помощью CHAR() (MS) и CONCAT() (M). Синтаксис: SELECT 0x457578 (M). В MySQL есть простой способ представления строки в...
SQL Инъекции | Page 798 | ANTICHAT - Security online community
http://www.compagniaperlamusica.com/iniziativa.php?id=(select+1+from(select+count(*),concat((select(select+concat(0x3d7e3d,user
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...
Уязвимость SQL-инъекция (ч. 1): Основы SQLi, простая инъекция...
Объединение запросов с UNION SELECT.
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.