https://msdn.microsoft.com/en-us/library/ms188365.aspx
读取csv
select * from OPENQUERY(DGKF,'select * from [test.csv]')---DGKF是路径
读取excel
select * from OpenRowSet('Microsoft.ACE.OLEDB.12.0',
'Excel 12.0;HDR=Yes;IMEX=1;Database=D:\test.xlsx',
'select * from [Sheet1$]')
