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How to bulk convert ISO8859 text in Text columns to UTF8 in nvarchar(max) columns? RRS feed

  • Question

  • Hi, I've been struggling for days with a problem on a MS SQL database. Here is the situation: I have an old Open Source PHP application (Limesurvey version 1.92) running on a Windows 2008R2 server, with SQL2008R2 as RDBMS. I need to migrate the surveys in the application to a new instance, running on Linux with MySQL. The new instance is version 3, and database structure between both versions is different. The scenario I tried to use is upgrading the old version on the old server, and then exporting the surveys as export files, which I can import into the new application. It works well. Except that I'm stuck because of a problem of character encoding. The old application (web application) uses UTF-8. But the database uses only VARCHAR and TEXT columns. Therefore UTF-8 characters are stored using several bytes in these columns : é is stored as é for example. When I upgrade the application, the upgrade script changes the structure of the tables: TEXT columns become NVARCHAR(MAX), but the content in the column is not converted to UTF-8. So I'm searching for a way to change the content in the NVARCHAR(MAX) columns from ISO8859 to UTF-8. The database has approx 200 tables and is 600MB.
    Tuesday, October 1, 2019 12:46 PM

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