В Новой Гвинее австралийские ученые нашли живыми две особи двух разных видов семейства кускусовых. Этих поссумов считали исчезнувшими 6000 лет назад, сообщает журнал Records of the Australian Museum.
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.。业内人士推荐WPS极速下载页作为进阶阅读
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Aston Martin has confirmed it will be axing 20% of its workforce, with the firm's net losses jumping 52% last year to £493.2m.，这一点在今日热点中也有详细论述
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