Obscuring data in a column with SQL Simon Hutchinson

​I am not sure if this is the most accurate title for what I want to do, obscure part of an email address as a hint for someone trying to signon to a web faced application. If someone has forgotten the email address they used to register, part of the process is to present them with a hint of the email address they used to sign up for the service. It obscures part of the username of the email address. For example, the email address:

[email protected]

Would be obscured to become:

[email protected]

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