text: 
  use StackOverflow
  create table users(
  	idUser int identity(1,1) ,
  	nombre varchar(20) not null,
  	pwd varchar(20) masked with (function='email()')  check(LEN(pwd)>8),
  	constraint PK_idUser_users PRIMARY KEY(idUser)
  )
  go
  
  select current_user as Usuario
  GO
  GRANT UNMASK TO angie
  EXECUTE AS USER ='angie'
  deny unmask to angie
  execute as user='dbo'
  go
  insert into users(nombre,pwd) values('angie','abanto27887')
  select * from users
  go
  
  alter table users
  		alter column pwd drop masked
  go
  alter table users
  		alter column pwd ADD MASKED WITH(FUNCTION='default()')
  go
  execute as user ='dbo'
  alter table users
  			alter column pwd DROP MASKED;
  ALTER TABLE users
  			alter column pwd ADD MASKED WITH (FUNCTION='partial(2,"xxxxxxxxxx",1)')
  go
  --LEARNING AS
  --AGREGAR MASCARAS --> column_name type MASKED WITH(FUNCTION ='[email(),default(),partial(begin,"struct",ending)]')
  --ALTERAR TABLA PARA LAS MASCARAS---> ALTER TABLE myTable ALTER COLUMN nyColumn ADD MASKED WITH(FUNCTION='(list_function)')
  --ELIMINAR MASCARAS----> ALTER TABLE myTable ALTER COLUMN myColumn DROP MASKED
  --- 
  ---agregar usuaris para masked
  ----> GRANT UNMASK TO [user]
  ----> REVOKE UNMASK TO [user]
  
  