KB2206: Upgrade fails with “Unable to use database VeeamBackup, because it has an unsupported compatibility level (SQL Server 2008 or later is required)”
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SQL SERVER - Failed Rule "Valid DSN" and "Valid Database compatibility level and successful connection" - SQL Authority with Pinal Dave
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How to change compatibility level of a SSAS Tabular Database using SSDT | Sql server, Change, Database
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