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Нашёл 13 млн ответов for 'the effect of alcoholic UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- ukgr'.

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UNION ALL SELECT NULL, *, NULL, NULL FROM email ... Use of an unqualified * with other items in the select list may produce a parse error. ... select NULL, email.*, NULL, NULL from email ... the tables when only using one table and selecting literals in addition to all the columns on that single...

https://www.docdroid.net/file/download/y6aFEhT/1589610482388-pdf.pdf

064-29: Creating Efficient SQL - Union Join without the Union Clause
SELECT col FROM a UNION SELECT col FROM b. data _null_; set a b; run; COL one two three six seven eight. The ambiguity whether to list table a or b first, before the UNION statement is a big hint that this query will perform sub-optimally at the database. When consituent table sizes are small one...

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

242-31: SQL Set Operators: So Handy Venn You Need Them
Before we look at the effect of this statement, let’s look at the syntax and compare it to that of the A set operator works on the results of two SELECTs. This is unlike a join, which is implemented within The OUTER UNION operator preserves columns which do not align, and generates nulls (missing...

https://support.sas.com/resources/papers/proceedings/proceedings/sugi31/242-31.pdf

Advanced SQL Injection
Union: The SQL UNION is used to combine the results of two or more SELECT SQL statements into a single result. Really useful for SQL Injection :) Blind: Asking the DB a true/false question and using whether valid page returned or not, or by using the time it took for your valid page to return as the...

https://index-of.es/Varios-2/Advanced%20SQL%20Injection.pdf

Chapter 3 Pointer Subterfuge
l One can use NULL byte attack. %00’ UNION SELECT password FROM tblUsers WHERE username=‘admin’--. URL Encoding for NULL. NULL byte can terminate strings and hence the remaining may Not be filtered May work in Managed Code Context.

https://index-of.es/Attacks/SQL%20injection%20attacks/Lecture8.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://index-of.es/Hacking/SQL-Injection/Blindfolded_SQL_Injection.pdf

SQL Injection
1234' and account=NULL; -- For mysql, there must be white space after --. You are identified as name userid. – We know account is a valid field name, because. 1234' or 1=1 union select null from balances; -- The used SELECT statements have a different number of columns. Introduction.

https://www.cs.montana.edu/courses/csci476/topics/sql_injection.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

Practical Identification of SQL Injection Vulnerabilities
Type: UNION query Title: MySQL UNION query (NULL) - 2 columns Payload: id=example' UNION ALL SELECT NULL, CONCAT(0x3a6e79753a,0x6b6a5645626a66695478,0x3a62716c3a)# AND 'JiRp'='JiRp&Submit=Submit ---. Although this vulnerability is reported in an HTTP GET parameter...

https://us-cert.cisa.gov/sites/default/files/publications/Practical-SQLi-Identification.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