Glad it is working for you.
The point in time thing is good for a single column but can be a real pita to show what the entire table looked like at a given point in time. You have to parse all the columns 1 by 1 to make sure you get the value for each column at that point in time. I have had to that very sort of thing for a SOX audit once and it was super ugly and SLOW to retrieve that data.
I feel your pain that your ERP has it already. We can't always design everything. Good luck and post back if you have any issues.
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