Cannot convert between unicode and non unicode string data types

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cannot convert between unicode and non unicode string data types

Differences between Unicode and Non Unicode Datatypes - MSSQL Training

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By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. It only takes a minute to sign up. All of the columns in my source table are varchars and so when I created my destination table, I made sure that they had the same data types. So both tables have varchar data types for all columns. However, I am still getting the error: Column "col1" cannot convert between unicode and non-unicode string data types.

One task that most people are faced with at some point in time is the need to import data into SQL Server from an Excel spreadsheet. These options are great, but they may not necessarily give you as much control as you may need during the import process. With SSIS you can import different types of data as well as apply other logic during the importing process. One problem though that I have faced with importing data from Excel into a SQL Server table is the issue of having to convert data types from Unicode to non-Unicode. SSIS treats data in an Excel file as Unicode, but my database tables are defined as non-Unicode, because I don't have the need to store other code sets and therefore I don't want to waste additional storage space. Is there any simple way to do this in SSIS?



SSIS: Cannot convert between unicode and non-unicode string data types during import

By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Setup a private space for you and your coworkers to ask questions and share information. I am using an Excel destination and using a SQL statement to create the sheet in the Excel workbook, the SQL is in the excel connection manager effectively a create table statement that creates a sheet and is derived from the mapping of the columns from the DB.

Cannot convert between unicode and non-unicode string data types error in SSIS

Thomas LeBlanc , When transferring data from one system to another, there are usually columns with different data types between the source and the destination. In this case of a data warehouse, the source column is an nvarchar and the target is a varchar. The developer of the data warehouse has decided to use a different data type for performance reasons. This example will look at the Product tables used in the transaction database AdventureWorks as well as the data warehouse version of the Product dimension table. You can download these databases by going to CodePlex. The staging package is simple.

This message indicates that a data flow component is trying to pass Unicode string data to another component that expects non-Unicode string data in the corresponding column. Codepages are sets of characters. Chinese characters codepage are different than western europeen characters codepage What is the data type of your source? Click on the green Data Flow Path between your source and the derived column and check the meta data. You could also add a CAST in your source query to avoid a lot of extra columns. So you need a conversion from unicode to 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:. What is this error? -

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Solving an SSIS Error – Cannot convert between Unicode and non-Unicode

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