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sql injection "union select null" - CodeProject | To display as

www.codeproject.com

Union select null, null, null, null, null, null, null from information_schema.tables. for a small database containing three tables. this instruction is used in sql injection I tried it and it worked but I didn't really know how it works can somebody help me...

Confusing SQL error in SELECT NULL, *, NULL, NULL - Stack Overflow

stackoverflow.com

UNION ALL SELECT NULL, *, NULL, NULL FROM email. I understand what this does and why; the hacker needs to create a query that has the same number of columns as the query it's being merged with, and shifted around

999999.9" //union//**/union/**/all/**/select/**/null, null, null, null, null..."

1494.kz

...null, null, null, null from information_schema.tables. for a small database containing three tables. this

Заметка про NULL / Хабр | select col from ttt where col is not null

habr.com

IS NULL вернёт истину, если операнд имеет значение NULL и ложь, если он им не является.

NULL pointer in C - GeeksforGeeks

www.geeksforgeeks.org

It should be noted that NULL pointer is different from an uninitialized and dangling pointer. In a specific program context, all uninitialized or dangling or NULL pointers are invalid but

SQL NULL Values - IS NULL and IS NOT NULL

www.w3schools.com

Note: A NULL value is different from a zero value or a field that contains spaces. A field with a NULL value is one that has been left blank during record creation!

999999.9 union all select 'r3dm0v3_hvj_injection', null, null, null, null...

asylornek.kz

null null null null — Toster.ru | «Тостер» — вопросы и ответы.

NULL (SQL) — Википедия

ru.wikipedia.org

NULL в Системах управления базами данных (СУБД) — специальное значение (псевдозначение), которое может быть записано в поле таблицы базы данных (БД). NULL соответствует понятию «пустое поле», то есть «поле, не содержащее никакого значения».

Pointer (computer programming) - Wikipedia

en.wikipedia.org

I do consider assignment statements and pointer variables to be among computer science's "most valuable treasures.". Donald Knuth, Structured Programming, with go to Statements.

Обработка значений NULL - ADO.NET | Microsoft Docs

docs.microsoft.com

Значение NULL в реляционной базе данных используется, если значение в столбце неизвестно или отсутствует.A null value in a relational database is

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"><script >alert(string.fromcharcode(88,83,83))</script>|xss|[kz] kazakstan|08/18/2020 17:41:56|') and 1=1 union all select 1,null,'<script>alert("xss")</script>',table_name from information_schema.tables where 2>1--/**/; exec xp_cmdshell('cat ../../../et
"><script >alert(string.fromcharcode(88,83,83))</script>|xss|[kz] kazakstan|08/18/2020 17:41:56|') and 1=1 union all select 1,null,'<script>alert("xss")</script>',table_name from information_schema.tables where 2>1--/**/; exec xp_cmdshell('cat ../../../et
%u0431%u0438%u043f%u044d%u043a %u0430%u0432%u0442%u043e %u043a%u043e%u0441%u0442%u0430%u043d%u0430%u0439 %u0446%u0435%u043d%u044b and 6908=(select (case when (6908=2550) then 6908 else (select 2550 union select 3456) end))-- hbpi
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%u0431%u0438%u043f%u044d%u043a %u0430%u0432%u0442%u043e %u043a%u043e%u0441%u0442%u0430%u043d%u0430%u0439 %u0446%u0435%u043d%u044b" and 3956=(select (case when (3956=2163) then 3956 else (select 2163 union select 4524) end))-- hzxq
%u0431%u0438%u043f%u044d%u043a %u0430%u0432%u0442%u043e %u043a%u043e%u0441%u0442%u0430%u043d%u0430%u0439 %u0446%u0435%u043d%u044b" and 7992=(select (case when (7992=7992) then 7992 else (select 8669 union select 1998) end))-- gyij
%u0431%u0438%u043f%u044d%u043a %u0430%u0432%u0442%u043e %u043a%u043e%u0441%u0442%u0430%u043d%u0430%u0439 %u0446%u0435%u043d%u044b") and 7992=(select (case when (7992=7992) then 7992 else (select 8669 union select 1998) end))-- wian
%u0431%u0438%u043f%u044d%u043a %u0430%u0432%u0442%u043e %u043a%u043e%u0441%u0442%u0430%u043d%u0430%u0439 %u0446%u0435%u043d%u044b") and 9729=(select (case when (9729=1260) then 9729 else (select 1260 union select 2140) end))-- gehw
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%u0431%u0438%u043f%u044d%u043a %u0430%u0432%u0442%u043e %u043a%u043e%u0441%u0442%u0430%u043d%u0430%u0439 %u0446%u0435%u043d%u044b%' and 9901=(select (case when (9901=7115) then 9901 else (select 7115 union select 6880) end))-- pffb

999999.9" /union/)/**/union/**/all/**/select/**/null,null,null,null,null,null,null,null,null,null--/**/eobp/all /select /cast(0x393133353134353632312e39 as char),/cast(0x393133353134353632322e39 as char) and "0"="0 на YouTube:

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