Really really depends on the volumes you are going to be loading, how many times you need to do it and on the whole infrastructure you have to play with.

Looks like normal issues with loading onto cluster indexes.

As the table is partitioned the fastest way would be to populate staging tables per partition and then using the...

as an advise whenever doing this type of conversions always select the individual parts on their own to see what the resulting value is.

SELECT SUM(vol)
FROM TABLE

in Addition to the above (really hard to read forums now) it seems a tad bit slower loading the forums initial page.

why not the 2013 or even the 2016 version of the ACE driver?

2013 - https://www.microsoft.com/en-ie/download/details.aspx?id=39358

2016 - https://www.microsoft.com/en-ie/download/details.aspx?id=50040

You do not need to buy any special product in...

If the server is Clustered then only TEMPDB can be on the local SSD

If it isn't then placing the DB on SSD could be an option.

And regular backups (every...

you need to change that bit of code to be dynamic sql - that way you can check for the existence of the column and only execute it if available

you do not need visual studio - it is advisable, but not a requirement.

SSDT will install on its own a Visual Studio Shell which contains all that is needed to...

One thing I would look at is splitting the call to the function dates into temp tables.

e.g. get distinct values of the dates that are being passed to the functions,...

change that foreach to a parallel.foreach is probably an option.

https://msdn.microsoft.com/en-us/library/dd460720(v=vs.110).aspx has a simple example.

and if required look for other examples on the net.

Thanks Steve. Indeed no pun intended with RTFM.

David, as per the link I added (from the manuals) there are indeed ways to do it - JDBC from what i could...