Re: Flat File unload/export/copy
| От | Obe, Regina |
|---|---|
| Тема | Re: Flat File unload/export/copy |
| Дата | |
| Msg-id | 53F9CF533E1AA14EA1F8C5C08ABC08D20197A1FD@ZDND.DND.boston.cob обсуждение исходный текст |
| Ответ на | Flat File unload/export/copy (Steve T <steve@retsol.co.uk>) |
| Ответы |
Re: Flat File unload/export/copy
(Steve T <steve@retsol.co.uk>)
|
| Список | pgsql-novice |
Steve,
Seems to work okay for me.
Which version of PostgreSQL are you using?
Looks like the query option was introduced in 8.2
I did a sample
copy (SELECT * FROM information_schema.tables WHERE table_schema LIKE
'pg%') to '/temp/pgcat.csv';
'pg%') to '/temp/pgcat.csv';
which should work in any db if you have admin rights and worked fine for me on an 8.2 install.
I suppose if you are using a version prior to 8.2, you could use the documented workaround
BEGIN; CREATE TEMP TABLE a_list_countries AS SELECT * FROM country WHERE country_name LIKE 'A%'; COPY a_list_countries TO '/usr1/proj/bray/sql/a_list_countries.copy'; ROLLBACK;
Hope that helps,
Regina
From: Steve T [mailto:steve@retsol.co.uk]
Sent: Fri 9/12/2008 12:10 PM
To: Obe, Regina
Cc: PostGreSQL
Subject: Re: [NOVICE] Flat File unload/export/copy
Regina,
I wasn't aware that you could!
I just tried and that syntax gave me an error:
rel_reinsure=# copy (select * from client where name like '%BERT%') to '/tmp/stevet.clients';
ERROR: syntax error at or near "(" at character 6
LINE 1: copy (select * from client where name like '%BERT%') to '/tm...
- I can do though:
rel_reinsure=# copy client (recno,code,name) to '/tmp/stevet.clients';
... or select all columns, but that is 'too global' and I just want 'WHERE name LIKE '%BERT%' type syntax.
On Fri, 2008-09-12 at 11:31 -0400, Obe, Regina wrote:
I wasn't aware that you could!
I just tried and that syntax gave me an error:
rel_reinsure=# copy (select * from client where name like '%BERT%') to '/tmp/stevet.clients';
ERROR: syntax error at or near "(" at character 6
LINE 1: copy (select * from client where name like '%BERT%') to '/tm...
- I can do though:
rel_reinsure=# copy client (recno,code,name) to '/tmp/stevet.clients';
... or select all columns, but that is 'too global' and I just want 'WHERE name LIKE '%BERT%' type syntax.
On Fri, 2008-09-12 at 11:31 -0400, Obe, Regina wrote:
And why can't you use copy? Something like below - COPY (SELECT * FROM sometable WHERE somevalue LIKE '%') TO '/path/to/textfile.csv' WITH NULL As 'NULL' CSV HEADER QUOTE AS '"'; ________________________________ From: pgsql-novice-owner@postgresql.org [mailto:pgsql-novice-owner@postgresql.org] On Behalf Of Steve T Sent: Friday, September 12, 2008 11:16 AM To: PostGreSQL Subject: [NOVICE] Flat File unload/export/copy Is there a command that copies data from a table to a flat file for specified selection criteria? IE akin to a copy but not dumping a whole file? If I'm about to do a major change to data in a table, I'd like to be able to keep a copy of the data before the change (I know I can Begin...rollback should things go wrong). Is there a command that I've missed? (Informix had an 'UNLOAD TO blah SELECT blah..' type command which presumably was proprietary). ----------------------------------------- The substance of this message, including any attachments, may be confidential, legally privileged and/or exempt from disclosure pursuant to Massachusetts law. It is intended solely for the addressee. If you received this in error, please contact the sender and delete the material from any computer.
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