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I don't think this is easy enough to make it worthwile with sql, but, maybe.....



Here's my client file that I want to update :

ClientId ClientName ClientVersion
15 Bigs 0


I receive a file containing clientId and the new name of the client, eg, clientId 15 becomes 'Smith'. But I can't just update the client file from this work file. I need to archive the original name, so I have this kind of representation after the update :

ClientId ClientName ClientVersion
15 Smith 0
15 Bigs 1

There's a timestamp field among the other fields. Version 0 is always updated to n+1 and a new line is written to the file. So, in the example, I've updated the line Bigs and I've written the line Smith.

So, version 0 is the current version and 1 is the old one. If I change now to 'Eggs', I want to see :

ClientId ClientName ClientVersion
15 Eggs 0
15 Bigs 1
15 Smith 2



I ask because I get this request now and again, for a few thousand clients at a time. I'm having to use an RPG to write to the client file, but I always end up using SQL to prepare a work file for that RPG.

Thanks.

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