How do I update all the records in a table from the contents of another table?

Question

Ok some situation information, I have a pervasive database that runs our accounting software that I am pulling a product list from.  I have that list stored in a table in SQL.  From time to time we update the records in the pervasive database and
I want to be able to pull those changes into the SQL table.  I don't want to drop the table and recreate it because if a product is no longer active in the pervasive database it will not be returned by the query (if I return all the products even the
inactive ones I will get thousands of records rather than just a few hundred) and I do not want to loose the products from the table that are now inactive.  
So what I want to be able to do is pull the list from pervasive, compare it to the list that exists in SQL and update any changed records, add any new records, and leave any now missing records alone(missing from the pervasive list but present in the SQL
list).  I have no trouble pulling the records from pervasive (now) but I am a little stumped on how to do the rest.  I am not sure if this is a situation to use MERGE or not.  I also do not really need this to be done on a regular basis as the
changes do not happen often enough for that, the ability to manually trigger it would be enough.
Any help would be appreciated.
David

Answer 1

Hi David,
lets say you want to go with the lookup transformation.
lets say u want to move the data from server A table A1 to Server B table B1
What you need to do is the following:
Cofigure the Lookup options as follows:
- In general -> Specify how to handle rows with no macthing entries -> "Redirect Rows to no Match Output"
-  In Connection -> Set the ole db connection to the Server B and select the table B you want to lookup the values in your case the table where you want to input the changes 
-  In columns -> link the product column from table A to product column in table B. And do not select any rows to output.
- now your component is ready next you need to input. so when u connect your lookup to the destination component You will get an option to select which output you want to use - use "Lookup No Match Output".
this will actually just allow you to add only new items only to the table B.
Teddy Bejjani - BI Specialist @ Netways