sql - Alias case statement -

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i have stored procedure return negative number in id. (on purpose). in additional, have view shows table (simple select), don't want '-' appear in id column, mean, if number negative - want add letter 'a' id without '-'.

how can this?

select replace (id, '-', 'a') myid

or if wanting append 'a'

select replace (id, '-', '') + 'a' myid

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