【full_table_scan】什么意思_英语full_table_scan的翻译_音标_读音_用法_例句_在线翻译

full table scan 添加释义

abstract: Full table scan (also known as sequential scan) is a scan made on the database where each row of the table under scan is read in a sequential (serial) order and the columns encountered are checked for the validity of a condition. Full table scans are usually the slowest method of scanning a table due to the heavy amount of I/O reads and writes required from the disk which consists of multiple seeks as well as costly disk to memory transfers.

以上来源于: WordNet

This query plan shows a full table scan.

该查询计划显示了一个全表扫描。

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This report query requires a full table scan of the fact table.

这个报表查询需要该事实表的一个全表扫描。

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Indexes improve query performance by avoiding a full table scan.

索引能够避免全表扫描，从而能够提高查询性能。

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