declare @text varchar(max) = 'BLACKHEATH 0AA BLACKHEATH COLCHESTER CO2 0AA'

declare @i int = 1;

declare @nextCharacter varchar(max)

declare @word varchar(max)=''

​

declare @lastChar varchar(1) = substring(@text,len(@text),1)

--select @lastChar

​

declare @lastIndex varchar(max) = charindex(@lastChar,@text,len(@text))

select @lastIndex

--select len(@text)

​

create table #tmp (id int,word varchar(max))

​

while (@i <= len(@text))

begin

​

    select @nextCharacter= substring(@text, @i, 1)

    --select @nextCharacter,@i, @lastChar, len(@text)

​

    if (@nextCharacter !=' ')

        begin       

            select @word = @word + @nextCharacter

        end

​

     else

        begin

            insert into #tmp

            values(@i,@word)

            set @word=''

        end

         if (@i = len(@text) and @nextCharacter= @lastChar)

        begin

        insert into #tmp

            values(@i,@word)                    

        end

​

    set @i = @i +1

​

end;

​

select id,word from #tmp order by id;

​

WITH tblTemp as

(

SELECT ROW_NUMBER() Over(PARTITION BY word ORDER BY id)

   As RowNumber,* FROM #tmp

) --select * from tblTemp

select * into #tmp2 FROM tblTemp where RowNumber =1 

​

declare @newString varchar(max)=''

select @newString = @newString +word+' ' from #tmp2 order by id 

​

select rtrim(@newString)

​

drop table #tmp2

drop table #tmp