Creates an external data source for use in two distinct scenarios: (1) for PolyBase or (2) Elastic Database queries. Depending on the scenario, the syntax differs significantly. A data source created for PolyBase cannot be used for Elastic Database queries. Similarly, a data source created for Elastic Database queries cannot be used for PolyBase.
As for external hemorrhoids, you can know easily as they are protruded outside the anal opening. Treatment wise, it is possible to treat them, including if they are in early stages as stated at the above. You also will feel the uneasy or pain since there are pain receptor at anal opening.
Enabling external sharing is not the same thing as enabling anonymous access. When external sharing is enabled, users must be authenticated (by signing in) before they can access internal resources.