Reverse string with out using in build function

DECLARE @t TABLE( ID INT IDENTITY, data VARCHAR(MAX))

INSERT INTO @t(data) SELECT 'Jacob'

INSERT INTO @t(data) SELECT 'Sebastian'



;WITH cteReverseRecur as (

    Select ID

     , RIGHT( data, 1 ) as RevStr

     , LEFT( data, LEN([data])-1 ) as RemStr

     From @t

  UNION ALL

    Select ID

     , RevStr + RIGHT( RemStr, 1 )

     , Left( RemStr, LEN(RemStr)-1 )

     From cteReverseRecur

     Where RemStr > '')

SELECT ID, RevStr as data

 From cteReverseRecur

 Where RemStr = '';