How the SQL UNION Operator Deals with NULL Values

So three NULLs were reduced to just one NULL. We can use the ALL keyword to include all duplicates, and that includes duplicate NULLs: Select null union all select null union all select null

OWASP – Testing for SQL Injection

... UNION SELECT with version() can also help to know the backend database. ... php?id=10 UNION SELECT 1,null,null--. If the query ... about the structure of the query ... So three NULLs were reduced to just one NULL. We can use the ALL keyword to include all duplicates, and that includes duplicate NULLs: Select null union all select null union all select null

SQL-инъекции' union select null, null, null -- / Хабр

?id=1' union select null,null,table_name,null from information_schema.tables Это стало возможным благодаря добавлению таблицы information_schema в MySQL 5.0+ и по ее наличию также можно косвенно определить версию используемой БД.

SQL Injection Series PHP + Mysql manual... - Programmer Sought

Use union select null, null, null is the same. information_schema mysql greater than 5.0 of the library version of the database and stores all information mysql table structure, it is possible using information_schema library was quickly injected.

SQL Injection Cheat Sheet | Invicti

No error—we now know the first column is an integer. 11223344) UNION SELECT 1,2,NULL,NULL WHERE 1=2 --. Microsoft OLE DB Provider for SQL Server error ... Use union select null, null, null is the same. information_schema mysql greater than 5.0 of the library version of the database and stores all information mysql table structure, it is possible using information_schema library was quickly injected.

sql - How null values are treated in union/union all in... - Stack Overflow

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. When you do a UNION query, both SELECT statements of the query must have the same number of columns.

MySQL SELECT only not null values | Gang of Coders

SELECT * (that are NOT NULL) FROM table. SELECT * FROM table WHERE YourColumn IS NOT NULL; Just for completeness I'll mention that in MySQL you can also negate the null safe equality operator but this is not standard SQL.

SQL injection UNION attacks | Web Security Academy

... NULL,NULL-- ' UNION SELECT NULL,NULL,NULL-- etc. ... NULL is convertible to every common data type, so ... data, the injected query will cause a database error, ... SELECT * (that are NOT NULL) FROM table. SELECT * FROM table WHERE YourColumn IS NOT NULL; Just for completeness I'll mention that in MySQL you can also negate the null safe equality operator but this is not standard SQL.

SQL Injection Workshop: a' UNION select table_schema,table_name ...

(SQL Injection Workshop). { a' UNION select table_schema,table_name FROM information_Schema.tables;# }. Background Information. This next workshop illustrates ... SELECT * (that are NOT NULL) FROM table. SELECT * FROM table WHERE YourColumn IS NOT NULL; Just for completeness I'll mention that in MySQL you can also negate the null safe equality operator but this is not standard SQL.

PayloadsAllTheThings/SQL Injection/MySQL Injection.md at master ...

' UNION ALL SELECT LOAD_FILE('/etc/passwd') --. UNION ALL SELECT TO_base64(LOAD_FILE('/var/www/html/index.php'));. If you are root on the database ... SELECT * (that are NOT NULL) FROM table. SELECT * FROM table WHERE YourColumn IS NOT NULL; Just for completeness I'll mention that in MySQL you can also negate the null safe equality operator but this is not standard SQL.

Union based Oracle Injection

Статья - SQL-injection, начало - UNION BASED - Codeby.net

CREATE TABLE login ( id INT NOT NULL AUTO_INCREMENT, nickname VARCHAR(30) NOT NULL, login VARCHAR(40) NOT NULL, statement INT NOT NULL, PRIMARY KEY(id) ) Отправляем запрос 99999' union select 1,2,database(),4 -- - Вот и наша базка golden_key.

SQL-инъекции: UNION атаки | Заметки разработчика

' UNION SELECT NULL-- ' UNION SELECT NULL,NULL-- ' UNION SELECT NULL,NULL,NULL-- etc. Если количество NULL не соответствует количеству столбцов, база данных возвращает ошибку, например Клонирование readonly свойств в PHP 8.3.

Advanced SQL Injection: Union based | VK9 Security

Select column_name from information_schema.columns where table_schema=database() and table_name='tablenamehere'. SELECT is_srvrolemember(‘sysadmin’); — is your account a sysadmin? returns 1 for true, 0 for false, NULL for invalid role.

MySQL 8.0 Reference Manual :: 15.2.20 WITH (Common ... - MySQL

MySQL Information Schema ... all dates in the series, including dates not represented in the summarized data. ... NULL UNION ALL SELECT e.id, e.name, CONCAT(ep ... Select column_name from information_schema.columns where table_schema=database() and table_name='tablenamehere'. SELECT is_srvrolemember(‘sysadmin’); — is your account a sysadmin? returns 1 for true, 0 for false, NULL for invalid role.

SQL Injection Bypassing WAF | OWASP Foundation

... union/union/select/select+1,2,3/*`. • After being processed by WAF, the request will become. ` index.php ... sEleCt +#1q%0AuNiOn all ... http://victim.com/news.php? Select column_name from information_schema.columns where table_schema=database() and table_name='tablenamehere'. SELECT is_srvrolemember(‘sysadmin’); — is your account a sysadmin? returns 1 for true, 0 for false, NULL for invalid role.

SQL Injection | HackTricks | HackTricks

9 февр. 2024 г. ... UNION SELECT. Select more and more null values until the query is correct: Copy 1' UNION SELECT null-- - Not working 1' UNION SELECT null,null ... Select column_name from information_schema.columns where table_schema=database() and table_name='tablenamehere'. SELECT is_srvrolemember(‘sysadmin’); — is your account a sysadmin? returns 1 for true, 0 for false, NULL for invalid role.

SQL Injection/UNION Attack - charlesreid1

... data from a product page, or to extract information about the database schema. ... ' UNION SELECT TABLE_NAME,NULL FROM information_schema.tables-- ... index.php? Select column_name from information_schema.columns where table_schema=database() and table_name='tablenamehere'. SELECT is_srvrolemember(‘sysadmin’); — is your account a sysadmin? returns 1 for true, 0 for false, NULL for invalid role.

SQL injection UNION attack. What is union select? | by ...

26 дек. 2019 г. ... ... know the names of any columns. When the ... ' UNION SELECT 'a',NULL,NULL,NULL -- ... data, the injected query will cause a database error, such as: Select column_name from information_schema.columns where table_schema=database() and table_name='tablenamehere'. SELECT is_srvrolemember(‘sysadmin’); — is your account a sysadmin? returns 1 for true, 0 for false, NULL for invalid role.