如何才能使SSIS查找转换忽略字母大小写？

Question

Hopefully this is easy to explain, but I have a lookup transformation in one of my SSIS packages. I am using it to lookup the id for an emplouyee record in a dimension table. However my problem is that some of the source data has employee names in all capitals (ex: CHERRERA) and the comparison data im using is all lower case (ex: cherrera).

The lookup is failing for the records that are not 100% case similar (ex: cherrera vs cherrera works fine - cherrera vs CHERRERA fails). Is there a way to make the lookup transformation ignore case on a string/varchar data type?

Answer 1

我认为没有办法使转换不区分大小写，但是您可以修改转换的SQL语句，以确保源数据与比较数据的大小写匹配，方法是使用LOWER（）字符串函数。

Answer 2

Set the CacheType property of the lookup transformation to Partial or None.

The lookup comparisons will now be done by SQL Server and not by the SSIS lookup component, and will no longer be case sensitive.

Answer 3

您必须更改源以及查找数据，两者都应该是相同的案例类型。

Answer 4

Based on this Microsoft Article :

The lookups performed by the Lookup transformation are case sensitive. To avoid lookup failures that are caused by case differences in data, first use the Character Map transformation to convert the data to uppercase or lowercase. Then, include the UPPER or LOWER functions in the SQL statement that generates the reference table

To read more about Character Map transformation , follow this link"

• Character Map Transformation