[ADMIN] Data migration to sql server 2008

[karthi keyan]

hello admin,
I am using Postgresql for my application development, which is very robust
and secure to use.

For some interlink application purpose , i need to *migrate data into Sql
server 2008*.
So please refer me, or give some samples, how i can migrate the data

Regards
Karthik

[Craig Ringer]

Post by karthi keyan
For some interlink application purpose , i need to *migrate data into
Sql server 2008*.

The simplest way is usually to connect with psql and export CSV data with:

\copy (SELECT ....) to '/path/to/file.csv' csv

or for a whole table:

\copy tablename to '/path/to/file.csv' csv

For usage of COPY see:

\h COPY

and http://www.postgresql.org/docs/current/static/sql-copy.html


... then load that CSV into MS SQL Server 2008 like you would anything else.


A more complicated but more powerful way is to use an ETL tool like
Pentaho or Talend to connect to both databases and merge/convert data.

--
Craig Ringer

[Craig Ringer]

[Replying via mailing list]

Thank you for u r reply.
I have establish the same by sql server *linked server method* .its is
working fine.
But right now i am facing the problem of .
-- Query i used in sql
Select * from openquery(Postgre,'
dblink_connect(''mycon'',''hostaddr=localhost; dbname=explore
;user=openerp; password=xplore)')
--- the response
Cannot process the object "
dblink_connect('mycon','hostaddr=localhost; dbname=explore
;user=openerp; password=xplore)". The OLE DB provider "MSDASQL" for
linked server "Postgre" indicates that either the object has no
columns or the current user does not have permissions on that object.
Pl help me to fix it out.

You haven't really shown enough information. In particular, where does
this 'Postgre' variable/table/whatever come from? What is it?

You should look at the PostgreSQL server logs to see if PostgreSQL is
sending an error when you attempt the connection and if so, what it is.
Consider also setting log_statement = 'all' in postgresql.conf so you
can see exactly what queries this "openquery" tool runs against PostgreSQL.

Please reply via the mailing list ("reply all") in future.

--
Craig Ringer

[Craig Ringer]

Actually my need is import data from PostgreSQL , and the same
process into sql server.

I'm guessing you didn't see what I wrote in reply to your message, where
I said:

You haven't really shown enough information. In particular, where does
this 'Postgre' variable/table/whatever come from? What is it?

You should look at the PostgreSQL server logs to see if PostgreSQL is
sending an error when you attempt the connection and if so, what it is.
Consider also setting log_statement = 'all' in postgresql.conf so you
can see exactly what queries this "openquery" tool runs against PostgreSQL.


By the way, the easiest way to do this sort of thing is usually to

COPY tablename TO '/some/file.csv' CSV

from PostgreSQL, then load that file into MS SQL server. That's trivial
to script with vbscript or whatever you prefer, using psql to get the
data out of PostgreSQL.

--
Craig Ringer