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Some WIP on documentation refactoring (#2659 )

* Additional .gitignore entries

* Merge a bunch of small articles about system tables into single one

* Merge a bunch of small articles about formats into single one

* Adapt table with formats to English docs too

* Add SPb meetup link to main page

* Move Utilities out of top level of docs (the location is probably not yet final) + translate couple articles

* Merge MacOS.md into build_osx.md

* Move Data types higher in ToC

* Publish changelog on website alongside documentation

* Few fixes for en/table_engines/file.md

* Use smaller header sizes in changelogs

* Group up table engines inside ToC

* Move table engines out of top level too

* Specificy in ToC that query language is SQL based. Thats a bit excessive, but catches eye.

* Move stuff that is part of query language into respective folder

* Move table functions lower in ToC

* Lost redirects.txt update

* Do not rely on comments in yaml + fix few ru titles

* Extract major parts of queries.md into separate articles

* queries.md has been supposed to be removed

* Fix weird translation

* Fix a bunch of links

* There is only table of contents left

* "Query language" is actually part of SQL abbreviation

* Change filename in README.md too

* fix mistype

2018-07-18 13:00:53 +03:00

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file

file(path, format, structure) - возвращает таблицу со столбцами, указанными в structure, созданную из файла path типа format.

path - относительный путь до файла от user_files_path.

format - формат файла.

structure - структура таблицы в форме 'UserID UInt64, URL String'. Определяет имена и типы столбцов.

Пример

-- получение первых 10 строк таблицы, состоящей из трёх колонок типа UInt32 из CSV файла
SELECT * FROM file('test.csv', 'CSV', 'column1 UInt32, column2 UInt32, column3 UInt32') LIMIT 10

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file

880 B

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