Thread: copying between Postgres databases
Hi; I've got two questions: 1) What is the best way to copy a Postgres table in one database into another Postgres database? Is it possible to copy the structure and the data at the same time? 2) Is there a way to do a short of pg_dump and to use the resulting file as input to another database, but preserving existing tables in this latter? Thanks and regards Javier
On March 17, 2003 04:21 am, you wrote: > Hi; > I've got two questions: > > 1) What is the best way to copy a Postgres table in one database into > another Postgres database? Is it possible to copy the structure and the > data at the same time? I believe that you can use pg_dump to just dump out one table. > > 2) Is there a way to do a short of pg_dump and to use the resulting file as > input to another database, but preserving existing tables in this latter? You can also specify the output of pg_dump to be all SQL commands.. and then only execute the queries in the pg_dump that you want. I'm not a huge expert on pg_dump myself, but try man pg_dump it should answer a lot of questions for you. Josh.
On Mon, Mar 17, 2003 at 10:21:29AM +0100, javier garcia - CEBAS wrote: > Hi; > I've got two questions: > > 1) What is the best way to copy a Postgres table in one database into another > Postgres database? Is it possible to copy the structure and the data at the > same time? pg_dump -t [tablename] -c -h [host1] database | psql -h [host2] database2 > 2) Is there a way to do a short of pg_dump and to use the resulting file as > input to another database, but preserving existing tables in this latter? The above will overwrite [tablename] in the target if it exists. Use it without -c if you want to preserve what's there, but be prepared for not-quite-what-you-expected results. A -- ---- Andrew Sullivan 204-4141 Yonge Street Liberty RMS Toronto, Ontario Canada <andrew@libertyrms.info> M2P 2A8 +1 416 646 3304 x110
On Mon, 17 Mar 2003, javier garcia - CEBAS wrote: > Hi; > I've got two questions: > > 1) What is the best way to copy a Postgres table in one database into another > Postgres database? Is it possible to copy the structure and the data at the > same time? > > 2) Is there a way to do a short of pg_dump and to use the resulting file as > input to another database, but preserving existing tables in this latter? Sure, just pipe the output of pg_dump to psql: pg_dump database1 -t tablename | psql database2 -e