Copy a table from one database to another in Postgres

Question

I am trying to copy an entire table from one database to another in Postgres. Any suggestions?

Answer 1

You have to use DbLink to copy one table data into another table at different database. You have to install and configure DbLink extension to execute cross database query.

I have already created detailed post on this topic. Please visit this link

Answer 2

You could do the following:

pg_dump -h <host ip address> -U <host db user name> -t <host table> > <host database> | psql -h localhost -d <local database> -U <local db user>

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Answer 3

Using psql, on linux host that have connectivity to both servers

( export PGPASSWORD=password1 
  psql -U user1 -h host1 database1 \
  -c "copy (select field1,field2 from table1) to stdout with csv" ) \
| 
( export PGPASSWORD=password2 
  psql -U user2 -h host2 database2 \ 
   -c "copy table2 (field1, field2) from stdin csv" )

Answer 4

Same as answers by user5542464 and Piyush S. Wanare but split in two steps:

pg_dump -U Username -h DatabaseEndPoint -a -t TableToCopy SourceDatabase > dump
cat dump | psql -h DatabaseEndPoint -p portNumber -U Username -W TargetDatabase

otherwise the pipe asks the two passwords in the same time.

Answer 5

Using dblink would be more convenient!

truncate table tableA;

insert into tableA
select *
from dblink('hostaddr=xxx.xxx.xxx.xxx dbname=mydb user=postgres',
            'select a,b from tableA')
       as t1(a text,b text);

Answer 6

If you have both remote server then you can follow this:

pg_dump -U Username -h DatabaseEndPoint -a -t TableToCopy SourceDatabase | psql -h DatabaseEndPoint -p portNumber -U Username -W TargetDatabase

It will copy the mentioned table of source Database into same named table of target database, if you already have existing schema.