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* Some improvements for introduction/performance.md
* Minor improvements for example_datasets
* Add website/package-lock.json to .gitignore
* YT paragraph was badly outdated and there is no real reason to write a new one
* Use weird introduction article as a starting point for F.A.Q.
* Some refactoring of first half of ya_metrika_task.md
* minor
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15 lines
577 B
Markdown
15 lines
577 B
Markdown
# Table Engines
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The table engine (type of table) determines:
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- How and where data is stored: where to write it to, and where to read it from.
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- Which queries are supported, and how.
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- Concurrent data access.
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- Use of indexes, if present.
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- Whether multithreaded request execution is possible.
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- Data replication.
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When reading data, the engine is only required to extract the necessary set of columns. However, in some cases, the query may be partially processed inside the table engine.
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Note that for most serious tasks, you should use engines from the `MergeTree` family.
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