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

4/4
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
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

242-31: SQL Set Operators: So Handy Venn You Need Them
Tutorials. Before we look at the effect of this statement, let’s look at the syntax and compare it to 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

The MIANALYZE Procedure | Only selected variables of
An F test is used to jointly test the null hypotheses (H0 W Lˇ D c) specied in a single TEST statement in which the MULT option is specied. Each equation species a linear hypothesis (a row of the L matrix and the corresponding element of the c vector); multiple equations are separated by commas.

https://support.sas.com/documentation/onlinedoc/stat/141/mianalyze.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' and acct=NULL; --Unknown column 'acct' in 'where clause'. – Gives a different message. Introduction. Some Attack Strings.

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

iqapgv2.book
Stored NULL values are then displayed as [NULL] in column prod_id, and “NULL” values created by ROLLUP are replaced with ALL in column PROD_IDS, as specified in the query. Each subtotal row contains a NULL value in the column or columns over which the subtotal is computed.

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

https://index-of.es/Hacking/SQL-Injection/Blindfolded_SQL_Injection.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