转储到CSV/Postgres内存 [英] Dump to CSV/Postgres memory

问题描述

我有一张大表(3亿行)，我想将其转储到csv中-我需要执行一些SQL无法完成的处理.现在，我正在使用Squirrel作为客户端，并且显然不能很好地处理大型数据集-至少从我自己的(有限的)经验中可以看出.如果我在实际主机上运行查询，它将使用更少的内存吗?感谢您的帮助.

I have a large table (300 million lines) that I would like to dump to a csv - I need to do some processing that cannot be done with SQL. Right now I am using Squirrel as a client, and it does not apparently deal very well with large datasets - at least as far as I can tell from my own (limited) experience. If I run the query on the actual host, will it use less memory? Thanks for any help.

推荐答案

尝试一下:

COPY tablename
TO 'filename.csv'
WITH 
      DELIMITER AS  ','
      NULL AS ''
      CSV HEADER

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