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Replacing NULL with 0 in a SQL server query - Stack Overflow

stackoverflow.com

When you want to replace a possibly null column with something else, use IsNull.

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

c - Is (int *) 0 a null pointer? - Stack Overflow

stackoverflow.com

If a null pointer constant is converted to a pointer type, the resulting pointer, called a null pointer, is guaranteed to compare unequal to a pointer to any object or function.

Шпаргалка по SQL инъекциям | DefconRU

defcon.ru

...1), null, null,NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULl, NULL-- Можно использовать CAST() или

c++ - Is uninitialized char* a null pointer? - Stack Overflow

stackoverflow.com

An uninitialized pointer can be null or non-null (or "both" or "neither"), and relying on predictable behaviour when using it is a bad idea. – chris May 9 '15 at 4:22. @chris, but if I use "string* s" then it always prints an andress like "0x401dee" – lxdthriller May 9 '15 at 4:26.

NULL pointer in C - GeeksforGeeks

www.geeksforgeeks.org

It should be noted that NULL pointer is different from an uninitialized and dangling pointer.

NULL (Си) — Википедия

ru.wikipedia.org

NULL в языках программирования Си и C++ — макрос, объявленный в заголовочном файле stddef.h (и других заголовочных файлах). Значением этого макроса является зависящая от реализации константа нулевого указателя (англ. null pointer constant).

Заметка про NULL / Хабр

habr.com

Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами. IS NULL вернёт истину, если операнд имеет значение NULL и ложь, если он им не является.

SQL NULL Values - IS NULL and IS NOT NULL

www.w3schools.com

A field with a NULL value is a field with no value. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this field.

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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
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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
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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 9729=(select (case when (9729=1260) then 9729 else (select 1260 union select 2140) end))-- gehw
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999999.9) /union/all /'/**/union/**/all/**/select/**/null,null,null,null,null,null,null,null,null,null--/**/mejc/select /cast(0x393133353134353632312e39 as char),/cast(0x393133353134353632322e39 as char),/cast(0x393133353134353632332e39 as char) and( на YouTube:

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