![]() ![]() The second file is a ragged right, fixed width 4 column file.Īfter completing some various web search results, I come to the conclusion that the problem is a known issue with a related Microsoft Connect entry. I actually created two different text files the first text file is a bar delimited, 4 column file as shown in the upper screen print below. As you can see from the screen prints below, most of the rows contain one or several special characters. First, we need to create a UTF-8 encoded text file with some special characters. Working with SSIS and UTF-8 Unicode DataĮnough of the theory and background let us put this knowledge into practice. To ease the conversion from prior encoding standards, keep in mind the first 128 UTF-8 characters match the ANSI character encoding standards. ![]() ![]() Of course, there is much more to it, so feel free to take a look at the link in the next steps section of this tip. I know I am going to do a disservice to the encoding process by explaining the transformation in these terms, however, UTF is sort of like the decryption key (or secret decoder ring!) used to map your backend bytes to the actual characters displayed on the screen. Drilling down further, UTF-8 is actually an encoding method for handling all the characters in the Unicode set of characters and stands for Unicode Transformation Format. The consortium was setup to standardize the numbering scheme assigned to represent a letter or character across all languages, countries, software products, and hardware platforms. Unicode is an encoding standard maintained by the Unicode Consortium most of the biggest players in the technology field (Google, SAP, Microsoft, Oracle) along with many others belong to the consortium. Some of the messages/errors you receive using SSIS can be very confusing, but this one is relatively straight forward, and now you know how to fix it.First, providing some background about UTF-8 and Unicode would likely go a long way into explaining how to handle these different code page types. We see that the OLE DB Destination no longer has a warning, so we run it below and we see that all of the data got imported into our table! We need to modify the input column from firstname to the new data conversion field called Converted_Firstname. Now double click the OLE DB Destination on the Data Flow screen so we can modify the mappings. We left length at 255 since that is what our database table is currently set at. We need to change the Data Type to because we want to convert the spreadsheet data into a Varchar format. For Output Alias, you can use the default name, but I changed ours to Converted_FirstName so I can find it easier. In our case, SSIS could not convert the Firstname to import into the database, so the Input Column will be firstname. If you double click the Data Conversion item, you can now tell it what you want to convert. This will allow us to convert the data from Unicode to Non-Unicode. We need to add a Data Conversion task from our SSIS Toolbox between the Excel Source and the OLE DB Destination. ![]() Here is how to fix this so you can get the data imported into your database. If you ignore this error and try and run the package anyway, you receive the following error: TITLE: Package Validation ErrorĮrror at Data Flow Task ]: Columns "firstname" and "FirstName" cannot convert between unicode and non-unicode string data types.Įrror at Data Flow Task : "OLE DB Destination" failed validation and returned validation status "VS_ISBROKEN".Įrror at Data Flow Task : One or more component failed validation.Įrror at Data Flow Task: There were errors during task validation. When we look at our SSIS package that was created to import the spreadsheet, we can see we have a warning saying the Firstname column cannot be converted to Unicode. Just do not make any structural changes to your tables without doing full testing before going into production. You can rebuild the table to make the FirstName column Nvarchar, but you do not have time right now to go through quality assurance to make sure the programs accessing this table are not affected. You can see that the Firstname column was setup as Varchar instead of Nvarchar. To read some of the differences for databases, please follow this link:īelow is a picture of our Excel file data, which is automatically unicode:īelow is how our database table that we want to import this data into is setup. What is this error? Excel data is usually stored in a Unicode format, but a database field can setup either be Unicode or Non-Unicode. Here is an issue you may receive if you try to import data from an Excel spreadsheet into a Sql Server database table:Įrror at Data Flow Task ]: Columns “firstname” and “FirstName” cannot convert between unicode and non-unicode string data types. ![]()
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