Important note!
The quota " in the string needs to be escaped using your language specific escape syntax.
c#, c++ \"
VB6, VBScript ""
xml (web.config etc) "
or maybe use a single quota '. |
| "HDR=Yes;" indicates that the first row contains columnnames, not data. "HDR=No;" indicates the opposite. |
| "IMEX=1;" tells the driver to always read "intermixed" (numbers, dates, strings etc) data columns as text. Note that this option might affect excel sheet write access negative. |
| SQL syntax "SELECT * FROM [sheet1$]". I.e. excel worksheet name followed by a "$" and wrapped in "[" "]" brackets. |
| Check out the [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Jet\4.0\Engines\Excel] located registry REG_DWORD "TypeGuessRows". That's the key to not letting Excel use only the first 8 rows to guess the columns data type. Set this value to 0 to scan all rows. This might hurt performance. |
| If the Excel workbook is protected by a password, you cannot open it for data access, even by supplying the correct password with your connection string. If you try, you receive the following error message: "Could not decrypt file." |
Driver={Microsoft Excel Driver (*.xls)};DriverId=790;Dbq=C:\MyExcel.xls;DefaultDir=c:\mypath;
Excel
"IMEX=1;" tells the driver to always read "intermixed" data columns as text 
