I'm reading data about changes history of work orders from database of SDP (I have MS SQL db). And now I need to get data of merged ticket, but I cannot find it in history table, it is totally deleted.

Is it true that after merging all data also changes history is deleted from SDP database?

In HistoryDiff table there is no history about this merged ticket, in History table too. Where can I get previous data of the ticket before it was merged? From which table?

Thanks.