Null - Wikipedia
https://en.wikipedia.org/wiki/Null
Null may refer to: Null (SQL) (or NULL), a special marker and keyword in SQL indicating that something has no value. Null character, the zero-valued ASCII character, also designated by NUL, often used as a terminator, separator or filler. This symbol has no visual representation.
null - JavaScript | MDN
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/null
The value null is written with a literal: null. null is not an identifier for a property of the global object, like undefined can be. Instead, null expresses a lack of identification, indicating that a variable points to...
null - Wiktionary
https://en.wiktionary.org/wiki/null
Ø (linguistics, abbreviation). ∅ (mathematics, abbreviation). Borrowed from Middle French nul, from Latin nūllus. (UK, US) IPA(key): /nʌl/. Rhymes: -ʌl. null (plural nulls). A non-existent or empty value or set of values. Zero quantity of expressions; nothing.
Null | Definition of Null by Merriam-Webster
https://www.merriam-webster.com/dictionary/null
Null definition is - having no legal or binding force : invalid. 2 : amounting to nothing : nil the null uselessness of the wireless transmitter that lacks a receiving station— Fred Majdalany.
Null: перевод, произношение, транскрипция, примеры...
https://WooordHunt.ru/word/null
Перевод слова null, американское и британское произношение, транскрипция, словосочетания, однокоренные слова, примеры использования.
SQL NULL Values - IS NULL and IS NOT NULL
https://www.w3schools.com/sql/sql_null_values.asp
What is a NULL Value? 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.
PHP: NULL - Manual
https://www.php.net/manual/en/language.types.null.php
The special null value represents a variable with no value. null is the only possible value of type null. A variable is considered to be null if: it has been assigned the constant null.
MySQL IS NULL & IS NOT NULL Tutorial with EXAMPLES
https://www.guru99.com/null.html
Null as a Value. In simple terms, NULL is simply a place holder for data that does not exist. When performing insert operations on tables, they will be times when some field values will not be available.