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Нашёл 7 млн ответов for 'textbook advertising UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL-- GGne'.

Nulls Make Things Easier?
SELECT NULL < NULL + 1; ?column? -(null). NULL represents unknown, not applicable, or unassigned. It has no data type, so comparing it to xed values always returns s. WITH ordertest AS ( SELECT NULL UNION ALL SELECT 2 UNION ALL SELECT 1 UNION ALL SELECT NULL.

https://momjian.us/main/writings/pgsql/nulls.pdf

iqapgv2.book
For the purpose of grouping, all NULL values are considered to be in the same group, even though NULL values are not equal to one another. 4 The resulting rows are grouped together based on distinct values of the expressions in the GROUP BY clause, treating NULL as a special value in each...

http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc00800.1510/pdf/iqapgv2.pdf

Advanced_SQL_InjectionV2
All queries in an SQL statement containing a UNION operator must have an equal number of expressions in their target lists. Change the first part of the query to a null or negative value so we can see what field will echo data back to us.

https://owasp.org/www-chapter-belgium/assets/2010/2010-06-16/Advanced_SQL_InjectionV2.pdf

OWASPBostonv1
▸ abcd' UNION ALL SELECT NULL,(SELECT version())--. Let’s fetch the current db user. current_user variables and the getpgusername() function: ▸ abcd' UNION ALL SELECT NULL,(SELECT user)

https://owasp.org/www-pdf-archive/Abhay_Boston_2017_World_Tour_Presentation.pdf

1'))) UNION ALL SELECT NULL, Concatenated SQL query# AND...
ORDER BY clause brute-forcing NULL brute-forcing Sequential number brute-forcing. The number of columns in the SELECT statement is fewer than the number of columns that you want to inject. Front Range OWASP Conference, Denver (USA).

https://owasp.org/www-pdf-archive/SQLinjectionNotOnly.pdf

SQL Injection in Oracle Webapps
SELECT firstname, lastname FROM customers UNION SELECT username, null FROM ALL_USERS ORDER BY 1,2. The most common techniques are the usage of "ORDER BY" or adding NULL values to the second query. SELECT * FROM table UNION.

http://www.red-database-security.com/wp/oracle_sql_injection_2009.pdf

Enterprise COBOL for z/OS V4.2 Language Reference
NULL, NULLS Represents a value used to indicate that data items defined with USAGE POINTER, USAGE PROCEDURE-POINTER, USAGE FUNCTION-POINTER, USAGE OBJECT REFERENCE, or the ADDRESS OF special register do not contain a valid address.

https://www.ibm.com/support/knowledgecenter/SS6SG3_4.2.0/com.ibm.entcobol.doc_4.2/PGandLR/igy3lr50.pdf

SQL Database Programmers Handbook
handle NULLs in col4. The specification said nothing about NULLs, so we have two choices: (1) discard all NULLs and. -- No NULL in the column. The advantages of using simple aggregate functions is that SQL. engines are tuned to produce them quickly and to optimize code containing them.

https://englishonlineclub.com/pdf/Advanced%20SQL%20Database%20Programmers%20-%20Handbook%20[EnglishOnlineClub.com].pdf

Web Application Injection Vulnerabilities: A Web App's Security...
NULL, NULL, NULL# Vector: UNION ALL SELECT NULL, NULL, NULL, NULL, NULL, NULL, NULL, Erik Couture, [email protected] Web Application Input Validation - 30 NULL, NULL, NULL, NULL, [QUERY], NULL, NULL, NULL, NULL, NULL, NULL#.

https://www.sans.org/reading-room/whitepapers/basics/web-application-injection-vulnerabilities-web-app-039-s-security-nemesis-34247

Web Application Injection Vulnerabilities: A Web App's Security...
NULL, NULL, NULL# Vector: UNION ALL SELECT NULL, NULL, NULL, NULL, NULL, NULL, NULL, Erik Couture, [email protected] Web Application Input Validation - 30 NULL, NULL, NULL, NULL, [QUERY], NULL, NULL, NULL, NULL, NULL, NULL#.

https://www.sans.org/reading-room/whitepapers/application/web-application-injection-vulnerabilities-web-app-039-s-security-nemesis-34247