tsql - SQL Server T-SQL TRIM END -

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i need trim ; string inside t-sql. if has it. below : 

declare @_tags nvarchar(max); set @_tags = 'bla; bla;';  --select trimend(@_tags, ';');

so, if @_tags ends ;, ; trimmed. how can that?

to remove if last char ;:

select     case        when right(@_tags, 1) = ';' replace (@_tags, ';', '')        else @_tags    end

to remove end 1 only:

select     case        when right(@_tags, 1) = ';' stuff(@_tags, len(@_tags), 1, '')        else @_tags    end

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