SQL is null and = null - Stack Overflow
The reasoning is that a null means "unknown", so the result of any comparison to a null is also "unknown". So you'll get no hit on rows by coding where my_column = null. SQL provides the special syntax for testing if a column is null, via is null and is not null, which is a special condition to test for...
Replacing NULL with 0 in a SQL server query - Stack Overflow
So the expressions ISNULL(NULL, 1) and COALESCE(NULL, 1) although equivalent have different nullability values. This makes a difference if you
sql injection "union select null" - CodeProject | To display as
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...
SQL Complete Tutorial - Example to find NULL and NOT NULL values...
In this video, I have explained about the NULL and NOT NULL values to find in the columns.
Re: like this UNION ALL SELECT CONCAT(0x716b756a71... | Forum
...NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,CONCAT(0x716b756a71,0x4b5163596666574b5461,0x7170656b71)' in /.
Шпаргалка по SQL инъекциям | DefconRU
...null,NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULl, NULL-- Можно использовать CAST() или
ISNULL (Transact-SQL) - SQL Server | Microsoft Docs
В.C. Проверка значений NULL в предложении WHERETesting for NULL in a WHERE clause. Не используйте для поиска значений NULL выражение
NULL (SQL) — Википедия
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».
Null character - Wikipedia
The null character (also null terminator or null byte) is a control character with the value zero. It is present in many character sets, including ISO/IEC 646 (or ASCII), the C0 control code, the Universal Coded Character Set (or Unicode), and EBCDIC.