What exactly are you trying to do?
You can affect what happens for some things by using a .tdc (Tableau Datasource Customization):
We are migrating the dashboard from one datasource (SQL server) to another Data source(Oracle DB)
Question 1 :
Whether i need to manually configure what its there in sql server ,the same needs to be der in Oracle db
whether we have any commands that will automatically move from sql server to oracle db
Kindly let me know this,its urgent ..
1. I don't understand your question.
2. This is not something Tableau does...nor any BI reporting tool. I would guess there are tools out there that could help with this but I don't know of any.
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you can create a brand new connection to the Oracle datasource and then do a replace datasource to change the visualizations to point at the new connection.