Deduplicating at query time can be achieved by grouping the data on the fields, which uniquely identify a row, and using the argMax function with a date field to identify the last value for other fields. ReplacingMergeTree allows rows with the same sorting key (ORDER BY key) to be deduplicated on merges. Note this is "best effort" only: sometimes parts will not be merged with the merge process scheduled at non-deterministic intervals. It, therefore, does not guarantee the absence of duplicates. Users can also utilize the FINAL modifier to force this deduplication at SELECT time. While FINAL does add overhead, it has received significant performance improvements in recent versions including multi-threaded processing, and is suitable for many production workloads.
Под обстрел попал заводПо данным Mash, под удар ВСУ попал завод, производящий микросхемы для мобильных устройств. Во время украинской атаки на предприятии была пересменка, сотрудники собирались домой.，推荐阅读TG官网-TG下载获取更多信息
，更多细节参见谷歌
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Or build from source:。新闻是该领域的重要参考