title: Error while creating "EXTERNAL DATA SOURCE" in SQL Server 2016 version, trying to connect local SQL Server with Azure Data Lake
body: <p>I am trying to connect SQL Server with Azure Data Lake using Polybase concept. While trying to create External Data Source below error is coming:</p>
  
  <p>SQL Command:</p>
  
  <pre><code> CREATE EXTERNAL DATA SOURCE AzureDataLakeStore_4
    WITH (
      TYPE = HADOOP,
       LOCATION = 'adl://pesdatalake1.azuredatalakestore.net',
      CREDENTIAL = [ADL_User3]
    );
  </code></pre>
  
  <p>Error: </p>
  
  <pre><code> Msg 105007, Level 16, State 1, Line 11
   Scheme of the input URI is not supported. Please revise the following 
   scheme and try again: 'adl'
  </code></pre>
  
  <p>Steps followed:</p>
  
  <ol>
  <li><p>Added Azure Data Lake in Azure portal.</p></li>
  <li><p>Loaded data file to Azure data lake.</p></li>
  <li><p>Did app registration, and created APP key, Auth Key and Oauth.</p></li>
  <li><p>Given access to data file for App created above.</p></li>
  <li><p>Created master key in SQL</p></li>
  <li><p>Created a Scoped Database Credential.</p></li>
  <li><p>Issue in creating External Datasource.</p></li>
  </ol>