Re: How to: copy records from one table to another?

Calle,

Notepad++ isn't the best choice for very large files, but try EditPad Lite
instead (I'm pretty sure it's the one I used once, although it's a few year
ago), as it does some clever loading of file content. It opens even very
large files in a jiffy.

Best,
Janus

On Mon, 25 Mar 2019 at 15:57, Calle Hedberg <calle(dot)hedberg(at)gmail(dot)com> wrote:

> Doug,
>
> That's neat - I wasn't aware of that. Just tried it for a 500mb dump, and
> it's quick and easy - the only slightly tricker part is to edit the sql. It
> worked using Notepad++ for that 500MB .sql file, but less sure if it works
> if the file is 5 or 50 GB...
>
> Anyway, nice to have it as an option.
>
> Regards
> Calle
>
> On Mon, 25 Mar 2019 at 15:37, Doug Easterbrook <doug(at)artsman(dot)com> wrote:
>
>> not sure if its been mentioned.
>>
>>
>> pg_dump -v -t (the specific table you want) which gives you the data plus
>> the table create plus the sql
>>
>> edit sql if need be
>>
>> psql -d newdatabase < theFileAbove
>>
>>
>>
>> *Doug Easterbrook*
>> *Arts Management Systems Ltd.*
>> mailto:doug(at)artsman(dot)com <doug(at)artsman(dot)com>
>> http://www.artsman.com
>> Phone (403) 650-1978
>>
>> On Mar 25, 2019, at 7:29 AM, Calle Hedberg <calle(dot)hedberg(at)gmail(dot)com>
>> wrote:
>>
>> Hi
>>
>> I often use CSV as a step too:
>> - Dump the data you want to work on, copy/edit or whatever from db 1 in
>> csv
>> - Copy the SQL for the same source table design and use it to create a
>> similar table in db 2 (using a different name where necessary)
>> - import the CSV data into that new table in db2
>> Then using the usual scripting tools to add/edit/delete the related data
>> in db2.
>>
>> I was unable to get foreign data wrappers to perform for larger data set
>> updates recently (few hundred million records), at least when those dbs
>> were on remote servers. Transferring a copy via CSV to use for the updates
>> were quick and easy.
>>
>> Regards
>> Calle
>>
>> On Mon, 25 Mar 2019 at 14:04, Dave Caughey <caugheyd(at)gmail(dot)com> wrote:
>>
>>> Hi Khushboo,
>>>
>>> And then what's the process to upload the downloaded records into the
>>> other database?
>>>
>>> Cheers,
>>> Dave
>>>
>>>
>>> On Mon, Mar 25, 2019 at 12:14 AM Khushboo Vashi <
>>> khushboo(dot)vashi(at)enterprisedb(dot)com> wrote:
>>>
>>>>
>>>>
>>>> On Fri, Mar 22, 2019 at 6:06 PM Dave Caughey <caugheyd(at)gmail(dot)com>
>>>> wrote:
>>>>
>>>>> Sorry, for the basic question, but I'm not sure if there are bug(s) in
>>>>> pgAdmin, or just that I'm clueless. (My money lies on the latter!)
>>>>>
>>>>> Imagine the scenario where you are adding a feature to a product that
>>>>> requires adding some new rows to a configuration table, and as part of the
>>>>> patch you need to replicate a bunch of record from your development
>>>>> database to your production databases.
>>>>>
>>>>> You'd think there'd be a number of options, e.g.,
>>>>>
>>>>> 1. After doing a "View/Edit..." | "Filter by", select the displayed
>>>>> records, click "copy" to get them on to the clipboard, then go to the
>>>>> production database, do a "View/Edit..." on the corresponding table, and
>>>>> paste. But, in my case, I need my auto-sequenced "id" column to be omitted
>>>>> (so it gets re-generated in the new table), so perhaps this isn't the right
>>>>> choice. Even worse, over the years, my database tables (auto-created via
>>>>> Hibernate used in a Java Servlet) no longer have the same column order.
>>>>> (Question: is there no way that copy-and-paste between tables can consider
>>>>> the column names so copying between (int id,int feature_id,text name) and
>>>>> (int id,text name,int feature_id) is possible?)
>>>>>
>>>>> 2. Or, I could right-click on the table and use Import/Export..."
>>>>> (Question: is there a way to filter the records that will get exported?
>>>>> Or is there a way to trigger import/export on the results of a
>>>>> "View/Edit..." | "Filter by"?). However, here the issue is the columns no
>>>>> longer have the same order (e.g., (int,int,text) vs (int,text,int)) so
>>>>> "Import/Export..." fails. (Question: Is that not what the "Header" toggle
>>>>> is supposed to do? I see that enabling it during export *adds* a header
>>>>> to the export files, but shouldn't enabling it during import cause it to be
>>>>> used to identify the order?). This method has the attraction that I can
>>>>> use the "Columns" tab to exclude one of the columns from my export (i.e.,
>>>>> my auto-sequenced "id" column).
>>>>>
>>>>> 3. Or, I could do a "Backup..." and then a corresponding "Restore..."
>>>>> , but I noticed that there the generated file contains CREATE DATABASE bits
>>>>> of code even though the "Include CREATE DATABASE" toggle in the Backup..."
>>>>> dialog is set to "No" (Question: bug, or my misunderstanding?). But I'm
>>>>> guessing that a backup/restore will generally do a complete and utter
>>>>> restore, rather than just moving some data.
>>>>>
>>>>> 4. Other options?
>>>>>
>>>>> How about *Download as CSV* option?
>>>>
>>>>> So, what is the best/simplest way to copy data between tables, given
>>>>> the possibility that some/all might apply?
>>>>>
>>>>> - The columns may be in a different order in different databases
>>>>> - One column might need be left blank
>>>>> - I only want to copy some of the records
>>>>>
>>>>> Cheers,
>>>>> Dave
>>>>>
>>>>
>>
>> --
>>
>> *Carl-Anders (Calle) Hedberg*
>>
>> HISP
>>
>> Researcher & Technical Specialist
>>
>> Health Information Systems Programme – South Africa
>>
>> Cell: +47 41461011 (Norway)
>>
>> Iridium SatPhone: +8816-315-19119 (usually OFF)
>>
>> E-mail1: calle(at)hisp(dot)org
>>
>> E-mail2: calle(dot)hedberg(at)gmail(dot)com
>>
>> Skype: calle_hedberg
>>
>>
>>
>
> --
>
> *Carl-Anders (Calle) Hedberg*
>
> HISP
>
> Researcher & Technical Specialist
>
> Health Information Systems Programme – South Africa
>
> Cell: +47 41461011 (Norway)
>
> Iridium SatPhone: +8816-315-19119 (usually OFF)
>
> E-mail1: calle(at)hisp(dot)org
>
> E-mail2: calle(dot)hedberg(at)gmail(dot)com
>
> Skype: calle_hedberg
>