针对Excel工作簿运行的SQL查询返回截断的文本字段

Question

I'm running a SQL SELECT query through an ADO connection to an Excel 2007 workbook with the following code (using a custom version of VBScript)

dim ado, rs
set ado = CreateObject("ADODB.Connection")
ado.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=workbook.xlsx;Extended Properties=""Excel 12.0 Xml;HDR=YES;IMEX=1"";"
ado.open()
set rs = ado.execute("SELECT * FROM [sheet1$]")

which is straighforward. The problem is that any cell that has text longer than 255 characters is truncated; is there any way around this? Is there a property in the connection string that will support this or is it an option I need to change in the excel document itself? I have tried MSSQL's CAST() function but this just causes an error when executed.

Any help would be greatly appreciated.

Answer 1

I think you're running into a variant of a long-standing limitation in Excel's data access provider. See http://support.microsoft.com/default.aspx?scid=kb;EN-US;189897 for an example or google for thousands more.

Answer 2

而不是尝试使用CAST（），您是否尝试过使用CONVERT（）函数？