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Import data from one sql server db to another

Posted on 2013-06-14
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Last Modified: 2013-07-06
We have purchased a company that uses the same software as us. The software runs off a SQL 2008 database. We want to import the data from the acquired companies db into our db. There are only a few tables that we need to import (Customer, Employee, BillingProfile). What is the easiest way to do that? My biggest concern is the primary keys on each table. Obviously they are sequentially different so how do I get the imported data to fall into the sequential order of our db?
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Question by:clifford_m71
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Expert Comment

by:Haresh Nikumbh
ID: 39247784
check below link if its works for you

http://www.codeproject.com/Questions/496992/Howplustoplusimportplusdataplusfromplusoneplussqlp

Please be inform before importing on actual server i will suggest test this on other server. if everything works fine then you can try on actual server.
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by:didnthaveaname
ID: 39247833
How do you assign the primary keys in your environment?  Is it with an identity column?  (i, personally, would be more concerned about the foreign keys)
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by:nemws1
ID: 39247852
This is going to be application specific.  What I've done in the past is to import the data into each table using a CURSOR and generating a new key.  I then create a new "mapping" table that records both the old key and the new key (I would do this for Employees and Customers)

Then, when I go to import subsequent files, I'll do a lookup on this mapping table to make sure data in say, the new entries Billing table, maps correctly to the new Customer data.

I've always done these types of imports row-by-row, using CURSORS (gasp!), even though I know it is slower to do so, but I do that so I know (and can easily print debugging messages) that everything is getting mapped over correctly.  If you were doing this import on a nightly basis I'd insist on trying to figure out an efficient way of doing it, but if this is a one-off, just get it done in whatever manner, as long as you can ensure you have data integrity.
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clifford_m71 earned 0 total points
ID: 39289770
Thanks for your suggestions. I ended up exporting the new data into excel. Changing the appropriate primary and foreign keys to whatever was next sequentially in our existing database then essentially did a select into line by line. By having it in excel I was able to copy several lines at a time. This was time consuming and tedious but got the job done.
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Author Closing Comment

by:clifford_m71
ID: 39303669
It worked
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