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Нашёл 12 млн ответов for 'textbook advertising UNION ALL SELECT NULL,NULL,NULL-- tyDn'.

064-29: Creating Efficient SQL - Union Join without the Union Clause
data _null_; merge a b; by key; run; KEY ACOL BCOL p one six q two seven r three eight. The row-wise join returns a single column 'col' instead with a select aNumCol from a UNION select aCharCol from b. Alot more subtle and, worse yet, platform specific is the issue of database performance.

https://support.sas.com/resources/papers/proceedings/proceedings/sugi29/064-29.pdf

Chapter 1 INTRODUCTION.
NULL Value Test Operator: IS NULL. Logical Operators: AND, OR and NOT. Combining multiple queries: The UNION clause. The NOT NULL column modifier adds the condition that a record cannot be inserted into the table if no value is supplied for this particular field.

https://my.uopeople.edu/pluginfile.php/57436/mod_book/chapter/37615/CS2203.Textbook.SQL.A.Practical.Intro.pdf

Null Session Enumeration from a
Exercise 1: Null session enumeration using WinScanX: in this exercise, you will run the GUI version of WinScanX to further enumerate your target system 9. You can also view the output of the scan by clicking the View Reports button and selecting the various reports of interest (these reports are saved...

https://www.utc.edu/center-academic-excellence-cyber-defense/pdfs/4660-lab4.pdf

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

The OWASP Foundation
1'))) UNION ALL SELECT NULL, Concatenated SQL query# AND ((('RaNd' LIKE 'RaNd. 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://www.owasp.org/images/e/ed/SQLinjectionNotOnly.pdf

OWASP Backend Security Project 1.0beta
File file = null; FileOutputStream fileOutputStream = null; String pattern = null; PatternLayout patternLayout = null; WriterAppender writerAppender = null SELECT NULL grantee, username granted_role FROM dba_users WHERE username LIKE UPPER('&&username') UNION SELECT...

https://owasp.org/www-pdf-archive/OWASP_Backend_Security_Project_1.0beta.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

Microsoft Word - Blindfolded SQL Injection - Final.doc
Injecting 11223344) UNION SELECT NULL,NULL,NULL,NULL WHERE 1=2 --, results in the following query Once the NULL-based UNION statement works, it is a trivial process to identify the types of each column. In each iteration a single field is tested for its type.

https://www.imperva.com/docs/IMPERVA_HII_blind-sql-injection-attacks.pdf

A name for the null pointer: nullptr (revision
§ Distinguishing between null and zero. The null pointer and an integer 0 cannot be distin-guished well for overload resolution. In this section, where changes are either specified by presenting changes to existing wording, strikethrough text refers to existing text that is to be deleted, and underscored text...

http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf

Nulls in SQL
• SQL use 3 truth values: true, false, unknown. • (NULL=20), NULL+5, NULL< a have value unknown • unknown AND true = unknown • unknown OR true = true, ... Logical operations can be explained concisely by equating. true=1, false=0, unknown=0.5, and defining functions and(x,y) = min(x,y) or(x...

https://www.cs.rutgers.edu/~borgida/cs336/SQL2.Sp17.pdf