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        将 SQL Server 表导出到多个部件文件

        Exporting SQL Server Table to multiple part files(将 SQL Server 表导出到多个部件文件)
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                  本文介绍了将 SQL Server 表导出到多个部件文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我需要将一个大约 100GB 的相当大的 SQL Server 表导出到 CSV 文件.但输出不是单个 csv 文件,理想情况下应该是多个文件,比如 10 个文件,每个 10GB.

                  I need to export a fairly large SQL Server table ~100GB to a CSV file. But rather than the output be a single csv file, it should ideally be multiple files say 10 files each 10GB.

                  我看到 BCP 有一个 batch_size 参数,但这仍然将所有数据写入单个文件?是否有其他免费实用程序可以满足我的要求?可以以字节或行数指定文件大小的地方?

                  I see BCP has a batch_size argument but this still writes all data to a single file? Are there other free utilities for doing what I require? Either where the size of file can be specified in bytes or number of rows?

                  就上下文而言,这是为了将数据与 Hive/Hadoop 平台中的其他来源相结合,因此如果有更好的导出数据的方法,我愿意接受建议.

                  For bit of context this is so the data can be combined with other sources in a Hive/Hadoop platform, so if there are better ways of exporting the data I'm open for suggestions.

                  推荐答案

                  我认为您可以将 SQL 2012 的分页函数 OFFSETFETCH 与 bcp 结合使用:

                  I think you could use SQL 2012's paging functions OFFSET and FETCH in conjunction with bcp:

                  SELECT *
                  FROM Table
                  ORDER BY ID --Primary Key
                  OFFSET 100000001 ROWS
                  FETCH NEXT 100000000 ROWS ONLY
                  

                  这篇关于将 SQL Server 表导出到多个部件文件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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