Re: Exporting Data

On 06/20/2013 06:06 AM, David Johnston wrote:
> guilherme wrote
>> I need to get some information in database and export it.
>>
>> Is there a way to make PostgreSQL to export one data line to a new file?
>> Like this:
>> 1 FIRST LINE --> line1.txt;
>> 2 SECOND LINE --> line2.txt;
>> 3 THIRD LINE --> line3.txt
>> ...
>> and so...
>>
>> I know that I can import all information into a unique file, but I need to
>> split that information into severel files.
>> I've already searched in everything and didn't find a solution.
>>
>> Can anybody help?
>>
>> Thanks in advance.
>
> I doubt it. You should export to a single file then use another tool to
> perform the split. What platform and you working on? If its Linux using
> "psql | some_splitting_command" should be doable.
>
> I guess you put your query into a function and use procedural language
> functionality to do that but I'm not sure on the necessary syntax.
>
> There may be third-party ETL tools that fulfill this need as well.

One I recently ran across is Dataset:

https://github.com/pudo/dataset

Docs:

https://dataset.readthedocs.org/en/latest/

In particular freezefile:

https://dataset.readthedocs.org/en/latest/freezefile.html

"mode specifies whether the query output is to be combined into a single
file (list) or whether a file should be generated for each result row
(item)."

>
> David J.
>

--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com