SQL ERROR: query=( SELECT 'common' AS book_type, pbs.book_section_id, pbs.snippet, b.id AS book_id, b.name AS book_name, b.year AS book_year, b.series AS book_series, b.link as book_link, b.litres_link, ba.id AS author_id, ba.name AS author_name, ba.link as author_link, bst.pid as pid, bs.link as section_link FROM kartaslov.phrases p JOIN kartaslov.phrase_book_section pbs ON pbs.phrase_id = p.id AND pbs.book_type = 'common' JOIN kartaslov.books b ON b.id = pbs.book_id JOIN kartaslov.book_authors ba ON ba.id = b.author_id JOIN kartaslov.book_section_text bst ON bst.id = pbs.book_section_text_id JOIN kartaslov.book_sections bs ON bs.id = bst.book_section_id WHERE p.phrase = ? LIMIT 0, 3 ) UNION ALL ( SELECT 'classic' AS book_type, pbs.book_section_id, pbs.snippet, cb.id AS book_id, cb.name AS book_name, cb.year AS book_year, cb.series AS book_series, cb.link as book_link, NULL AS litres_link, cba.id AS author_id, cba.name AS author_name, cba.link AS author_link, cbst.pid as pid, cbs.link as section_link FROM kartaslov.phrases p JOIN kartaslov.phrase_book_section pbs ON pbs.phrase_id = p.id AND pbs.book_type = 'classic' JOIN kartaslov.classic_books cb ON cb.id = pbs.book_id JOIN kartaslov.classic_book_authors cba ON cba.id = cb.author_id JOIN kartaslov.classic_book_section_text cbst ON cbst.id = pbs.book_section_text_id JOIN kartaslov.classic_book_sections cbs ON cbs.id = cbst.book_section_id WHERE p.phrase = ? LIMIT 0, 3 ); err=Unknown column 'pbs.book_section_id' in 'SELECT' SQL_ERR Python null — meaning, Synonyms & Top Google/Yandex Results
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python null

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Information update date: 2026/03/31

📊 Summary: python null

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Search frequency: 506
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1 pythonworld.ru /tipy-dannyx-v-pytho...
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https://pythonworld.ru/tipy-dannyx-v-python/none.html
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None (null), или немного о типе NoneType
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None (null), или немного о типе NoneType
Концепция ключевого слова null в том, что она дает переменной нейтральное или "нулевое" поведение. А что же в Python ? Эквивалент null в Python
2 stackoverflow.com /questions/3289601/n...
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https://stackoverflow.com/questions/3289601/null-object-in-python
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Null object in Python
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Null object in Python
In Python, the ' null' object is the singleton None . To check if something is None, use the is identity operator.
3 realpython.com /null-in-python/
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https://realpython.com/null-in-python/
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Null in Python
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Null in Python
Python uses the keyword None to define null objects and variables . While None does serve some of the same purposes as null in other languages, it's another ...
4 dev-notes.ru /articles/python/und...
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https://dev-notes.ru/articles/python/understanding-nonetype-object/
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Null в Python
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Null в Python
13 апр. 2023 г. — В Python для определения null объектов и переменных используется ключевое слово None . Хотя None служит для тех же целей, что и null в других ...
5 geeksforgeeks.org /python/null-in-pyth...
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https://geeksforgeeks.org/python/null-in-python/
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Null in Python
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Null in Python
23 июл. 2025 г. — Use cases of null · Null is often used in scenarios where a value is not yet assigned, not applicable or intentionally missing. · Optional ...
6 sky.pro /media/obekt-null-v-...
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https://sky.pro/media/obekt-null-v-python/
Title
Объект Null в Python
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Объект Null в Python
21 авг. 2023 г. — В заключение, None в Python — это специальный тип объекта, который используется для обозначения «ничего» или «пустоты». Это не то же самое, что ...
7 proghunter.ru /articles/the-none-n...
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https://proghunter.ru/articles/the-none-null-object-in-python-how-it-works-and-why-it-is-needed
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Объект None (null) в Python
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Объект None (null) в Python
22 мар. 2023 г. — Объект None - это объект-сентинел, который используется для представления отсутствия значения в Python . Он является единственным экземпляром ...
8 stepik.org /lesson/440564/step/...
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https://stepik.org/lesson/440564/step/1
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Шаг 1 – Тип данных NoneType
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Шаг 1 – Тип данных NoneType
Концепция ключевого слова null заключается в том, что оно дает переменной нейтральное или "нулевое" поведение. В языке Python , слово null заменено на None , ...
9 copahost.com /blog/null-python/
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https://copahost.com/blog/null-python/
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Null Python
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Null Python
11 авг. 2023 г. — It indicates the absence of a value or reference to an object that does not exist . In Python, the null value is represented by the special ...
10 sentry.io /answers/use-the-nul...
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https://sentry.io/answers/use-the-null-object-in-python/
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Use the null object in Python
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Use the null object in Python
15 окт. 2023 г. — None is Python's equivalent of null . It is a singleton object of the class NoneType . It is universally available and cannot be reassigned.

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