जगदीश खोलिया: Reverse a string using CTE in sql

Thursday, November 17, 2011

Reverse a string using CTE in sql

DECLARE @StringToReverse VARCHAR(55)
    SET @StringToReverse = 'jagdish kholiya'   
    ;WITH cte AS (
          SELECT @StringToReverse AS string, CAST('' AS VARCHAR(55)) AS revStr, LEN(@StringToReverse) AS ln        
           UNION ALL
          SELECT SUBSTRING(string,0,ln) AS string, CAST(revStr + SUBSTRING(string,ln,1) AS VARCHAR(55)) AS revStr, ln-1 AS ln
          FROM cte
          WHERE ln >= 1)
    SELECT @StringToReverse AS String, revStr FROM cte WHERE ln = 0
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