Generate the statistics of a table after truncating it and then repopulate it? Is it necessary to generate the statistics of a table after truncating it and then repopulate it?
I have a table with several million rows in Oracle.Every week new data is recharged, truncating the table and then loading the data.

Each time a new data load is made, I must generate the statistics again. Should I also rebuild the indexes?
Some columns are encrypted with TDE.
Thank you
As a general guidelines, it is usually recommended to do a gather stats on table whenever more than 10% of the rows are modified. So in your case, you will need to do a stats gather post data load. 
The index stats gather are taken care of if we do table stats gather using cascade option.