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Нашёл 3 млн ответов for 'textbook advertising UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL-- UFex'.

Microsoft Word - Blindfolded SQL Injection - Final.doc
This type of NULL injection serves two purposes. The main purpose is to get a working UNION statement that has no errors. Although this UNION still does not retrieve any real data, it provides an indication that the statement indeed works. Another purpose of this empty UNION is to get a 100...

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

Advanced SQL Injection
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.

https://www.nds.ruhr-uni-bochum.de/media/hfs/attachments/files/2010/03/hackpra09_kornburst_advanced_sql_injection.pdf

Microsoft PowerPoint - PresentationCabot.pptx
§ OCLVoid includes the null value (and therefore all supertypes of OCLVoid). Union of set and set2 Intersection of set and set2 Difference set; elements of set, which do not consist in set2 Set of all elements § Select – Result: Subset of collection, including elements where booleanExpr is true.

http://www.sti.uniurb.it/events/sfm12mde/slides/cabot.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

Which query creates a projection of the DEPARTMENT_NAME and
A and C return null values because any arithmetic expression that involves a null will return a null. Any records with NULL COMMISSION_PCT must appear last: SELECT LAST_NAME, SALARY, COMMISSION_PCT FROM EMPLOYEES WHERE LAST_NAME LIKE 'R%'.

http://fsgsss.edu.govmu.org/English/DOCUMENTS/Q_ANSWERS.PDF

Microsoft Word - ORA291%20Oracle%20BIEE%2011g%20Answers...
7. Select is greater than or equal to as the operator, and enter 70 as the value. OBIEE Answers provides you with the means to create analyses that are Unions or Intersections of multiple analyses. While we are working as developers in Answers, the value of Combo_Period is null.

https://it.cornell.edu/sites/default/files/OBIEE%2011/OBIEE11-8v3.pdf

TTCN-3 Quick Reference Card
var address v_myPointer := null; var verdicttype v_myVerdict; objid { 0 4 0 }. reference of component or SUT interface (global scope); null is concrete address value; fixed values: none (default), pass, inconc, fail, error; values are the set of all syntactically correct object identifier values (use with ASN.1...

https://blukaktus.com/TTCN3QRC_viewme.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

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

Microsoft Word - guru's guide to transact-sql.doc
The NULL/NOT NULL specification is used to control whether a column can store SQL's NULL token. A RIGHT JOIN returns the columns in the first table as NULLs when the join condition fails. Since you decide which table is the first table and which one's the second, whether you use a LEFT...

http://ccs1.hnue.edu.vn/hoanpt/DBMS/REF/thegurusguidetotransactsql2000.pdf