Обсуждение: Data migration to sql server 2008

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

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.

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Craig Ringer

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.

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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.

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Craig Ringer