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I have an Excel file that I import weekly into a table.

I am using Excel 2010 and SSMS 2012. The import failed this week and I have been unable to determine why. I was able to successfully import the data into a new table. The table definitions of the new table match the ones of my old table, so that does not seem to be the issue. Below is a screen shot of the error I receive. I have checked the PO header text field and there is nothing that exceeds the datatype of varchar(255) that I have it as.

Also, I sorted the data just to see if a certain row was causing the issue and more data did insert, but I still got the error and it was not on the same row as the original import attempt. I even dropped and created the original table again and I still receive the error.

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问题可能是如何Import/Export Wizard或SSIS获取有关数据类型的元数据的方式。

它使用前几行。如果有一个长字符串（长于 255），则数据类型为 memo，否则为字符串。

一种解决方法是根据文本列降序的长度对 Excel 行进行排序。

从Excel 源

截断的文本。

当驱动程序确定 Excel 列包含文本数据时，驱动程序会根据其采样的最长值选择数据类型（字符串或备忘录）。如果驱动程序在其采样的行中未发现任何超过 255 个字符的值，它会将列视为 255 个字符的字符串列而不是备注列。

因此，超过 255 个字符的值可能会被截断 要从备注列导入数据而不截断，您必须确保至少有一个采样行中的备注列包含超过 255 个字符的值，或者您必须增加数量由驱动程序采样的行以包含这样的行。

您可以通过增加 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Jet\4.0\Engines\Excel 注册表项下的 TypeGuessRows 的值来增加采样的行数。有关详细信息，请参阅 PRB：从 Jet 4.0 OLEDB 源传输数据失败并出现错误。

于 2017-08-23T16:32:11.423 回答