As we continued with the execution of our migration plans from SQL Server 2005 to 2008 R2 X64, we found challenges than needed to be resolved pretty quickly. The latest issue we encountered was the Microsoft.ACE.OLEDB.12.0 provider in SQL Server 2008 R2 X64.
With that same provider, we were able to load Excel files directly into SQL Server 2005 X64 (SP3 and SP4), but had no luck in 2008 R2.
The prerequisites are to install the Microsoft Access Database Engine 2010 Redistributable, and to add the provider, with a couple of configuration changes:
exec sp_configure 'show advanced options', 1;
exec sp_configure 'Ad Hoc Distributed Queries', 1;
EXEC master.dbo.sp_MSset_oledb_prop N'Microsoft.ACE.OLEDB.12.0', N'AllowInProcess', 1;
EXEC master.dbo.sp_MSset_oledb_prop N'Microsoft.ACE.OLEDB.12.0', N'DynamicParameters', 1;
'SELECT * FROM [Subsets & Ads$] WHERE Headline IS NOT NULL')
SELECT * FROM OPENROWSET('MSDASQL',
'DRIVER=Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb);FIL=excel 12.0;DriverId=1046;DefaultDir=M:\MSSQL10_50.MWTOOLS\MSSQL\DATA\dreambox.xlsx', 'SELECT * FROM [Subsets & Ads$]')
After the change our application worked flawlessly.