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

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

Alcoholics Anonymous Second Edition
We alcoholics are men and women who have lost the ability to control our drinking. We know that no real alcoholic ever recovers control. All of us felt at times that we were regaining control, but such inter-vals--usually b rief--were ine vitab ly followed by still less control, which led in time to pitiful and...

https://www.12step.org/docs/BigBook.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

Microsoft Word - Blindfolded SQL Injection - Final.doc
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. All three types (number, integer, string) are tested for the field, one of them should work. This way, it takes up to three times the number of...

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

Csg2
Group Functions and Null Values 5-11. Using the NVL Function with Group Functions 5-12. Creating Groups of Data 5-13. You can add data through a view unless it contains any of the items listed in the slide or ther e are NOT NULL columns, without default values, in the base table that are not selected...

https://index-of.es/Rdbms/Oracle9i%20SQL-Slide%20&%20Guide-II.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
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

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

Package ‘dplyr’
The default (NULL) is equivalent to "{.col}" for the single function case and "{.col} {.fn}" for the case where a list is used for .fns. ¡tidy-select¿ Columns to transform. Because across() is used within functions like summarise() and mutate(), you can’t select or compute upon grouping variables.

https://cran.r-project.org/web/packages/dplyr/dplyr.pdf

Package ‘readxl’
Name of le. If NULL, the example les will be listed. Examples. readxl_example() readxl_example("datasets.xlsx"). Either NULL to guess all from the spreadsheet or a character vector containing one entry per column from these options: "skip", "guess", "logical", "numeric", "date", "text"...

https://cran.r-project.org/web/packages/readxl/readxl.pdf