Microsoft SQL Server Dynamic data masking Add partial mask on column
Example
You can add partial mask on the column that will show few characters from te beginning and the end of the string and show mask instead of the characters in the middle:
ALTER TABLE Company
ALTER COLUMN Phone ADD MASKED WITH (FUNCTION = 'partial(5,"XXXXXXX",2)')
In the parameters of the partial function you can specify how many values from the beginning will be shown, how many values from the end will be shown, and what woudl be the pattern that is shown in the middle.
When user tries to select emails from Company table, he will get something like the following values:
(381)XXXXXXX39
(360)XXXXXXX01
(415)XXXXXXX05
