From: | "Greg Sabino Mullane" <greg(at)turnstep(dot)com> |
---|---|
To: | pgsql-general(at)postgresql(dot)org |
Cc: | patrickbakerbr(at)gmail(dot)com |
Subject: | Re: pg_sample |
Date: | 2016-10-19 02:58:22 |
Message-ID: | f7ca973dc47a6d83bc48a8f78f7d0987@biglumber.com |
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Lists: | pgsql-general |
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Patrick B <patrickbakerbr(at)gmail(dot)com> writes:
...
> However, this new database test server doesn't need to have all the data. I
> would like to have only the first 100 rows(example) of each table in my
> database.
...
This should do what you ask.
If the order does not matter, leave out the ORDER BY.
This assumes everything of interest is in the public schema.
$ createdb testdb
$ pg_dump realdb --schema-only | psql -q testdb
$ psql realdb
psql> \o dump.some.rows.sh
psql> select format($$psql realdb -c 'COPY (select * from %I order by 1 limit %s) TO STDOUT' | psql testdb -c 'COPY %I FROM STDIN' $$, table_name, 100, table_name)
from information_schema.tables where table_schema = 'public' and table_type = 'BASE TABLE';
psql> \q
$ sh dump.some.rows.sh
- --
Greg Sabino Mullane greg(at)turnstep(dot)com
End Point Corporation http://www.endpoint.com/
PGP Key: 0x14964AC8 201610182256
http://biglumber.com/x/web?pk=2529DF6AB8F79407E94445B4BC9B906714964AC8
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