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20 строки
801 B
Plaintext
20 строки
801 B
Plaintext
https://clickhouse.com/docs/ru/engines/table-engines
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https://clickhouse.com/docs/ru/engines/table-engines/mergetree-family
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https://clickhouse.com/docs/ru/engines/table-engines/mergetree-family/replacingmergetree
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only eventually dedups (and on mutations)
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https://clickhouse.com/docs/en/engines/table-engines/special/join
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https://clickhouse.com/docs/en/guides/developer/deduplication
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https://kb.altinity.com/altinity-kb-schema-design/insert_deduplication/
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2024
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https://habr.com/ru/companies/oleg-bunin/articles/836078/
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select ... final
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optimize table <> final -- for replacingmergetree only
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! clickhouse has no transactionality !
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index granularity (8192 - num of rows to read at once)
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primary index is stored in RAM
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2021
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https://habr.com/ru/articles/539538/
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! need to read
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