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Нашёл 3 млн ответов for 'college strategies UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- ZhBt'.

A name for the null pointer: nullptr (revision
A null pointer constant is an integral constant expression (expr.const) rvalue of integer type that evaluates to zero. Two null pointer values of the same type shall compare equal. The conversion of a null pointer constant to a pointer to cv-qualified type is a single conver-sion, and not the sequence of...

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

Inserting NULL values into a table and Selecting NULL values
select * from Employee1; -- Employee1 table does NOT have FK constraint superssn to PK ssn, so any value including NULL or ' ' will be accepted but NULL is taken as missing Insert Into Employee1 Values ('James', 'X', 'Brog1', '888660001','10-Nov-27','450 Stone, Houston, TX', 'M','55000', Null,'1')

http://cis.csuohio.edu/~sschung/cis430/HandlingNULLvalues.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

BET CODES copy
Null null null.

https://www.africabet.co.zw/pdf/static_pages/pdf/betcodes_layout_2.pdf

1'))) UNION ALL SELECT NULL, Concatenated SQL query# AND...
ORDER BY clause brute-forcing NULL brute-forcing Sequential number brute-forcing. 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

Microsoft Word - NULL and Nothing 20161013.docx
NULL propagates in all expressions. This means that the calculation will be made although some operands or function parameters are NULL. How to search and select NULLs or missing values? NULLs cannot be selected explicitly, so to find the records with NULLs, the selection must always be...

https://community.qlik.com/cyjdu72974/attachments/cyjdu72974/qlikview-documents/4380/1/NULL%20and%20Nothing.pdf

Rela7onal Model (Chapter 2) | Null value
Careful with NULLs: select name from instructor where salary < 100000 or salary >= 100000; Wouldn’t return the instructor with NULL salary (if any). Suppose a tuple occurs m times in r and n times in s, then, it occurs: ● m + n times in r union all s ● min(m,n) times in r intersect all s ● max(0, m – n) times...

https://www.cs.umd.edu/class/fall2015/cmsc424/lecture-relational.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.

http://injection.rulezz.ru/Blindfolded_SQL_Injection.pdf

slide.dvi | select customer-name from customer
Above statement ignores null amounts; result is null if there is. & no non-null amount. • All aggregate operations except count(*) ignore tuples with null values on the aggregated customer-name. Jones Smith null Hayes. • Find all customers who have either an account or a loan (but not both) at the bank.

https://cs.nyu.edu/courses/spring01/G22.2433-001/mod4.2.pdf