Dynamic data masking in SQL Server 2016

DDM: Dynamic Data Masking = Limit exposure to sensitive data by masking
- Full masking: entire column is marked.
- Partial masking: show starting and/or ending characters of the column data.
- Random masking: entire column is replaced by random values.
- Data is the database is not changed.

    MyColumn VARCHAR(20) MASKED WITH (FUNCTION = 'partial(1, "...", 0)')

- ALTER ANY MASK: add, replace or remove a column mask.
- UNMASK: view unmasked data in masked columns.

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