Is there a built-in function that can convert numbers into words in sql server

Question

I have a table currency:

Dollar  
------  
10   
100  
1000    
120.20  

O/P

Dollar  
--------    
Ten dollar  
Hundred dollar  
One Thousand dollar  
One Hundred Twenty dollar and Twenty cents

Answer 1

There is a function, Util_ToWords, in the Free version of the SQL# SQLCLR library that I wrote that does this (well, without the "dollar(s)" and "cents" words added):

SELECT SQL#.Util_ToWords(10); -- Ten
SELECT SQL#.Util_ToWords(100); -- One Hundred
SELECT SQL#.Util_ToWords(1000); -- One Thousand 
SELECT SQL#.Util_ToWords(120.20); -- One Hundred Twenty and 20
SELECT SQL#.Util_ToWords(212); -- Two Hundred Twelve
SELECT SQL#.Util_ToWords(123097.4);-- One Hundred Twenty Three Thousand, Ninety Seven and 40

The following example injects the "dollar(s)" and "cents" words into the return value (which was originally intended for printing on checks):

DECLARE @Amount MONEY = 2.08;

;WITH cte AS
(
  SELECT N' dollar' + CASE WHEN @Amount >= 1.00 AND @Amount < 2.00 THEN N''
              ELSE N's'
         END AS [Currency],
         SQL#.Util_ToWords(@Amount) AS [Words]
)
SELECT CASE CHARINDEX(N' and ', cte.[Words])
           WHEN 0 THEN cte.[Words] + cte.[Currency]
           ELSE STUFF(cte.[Words], CHARINDEX(N' and ', cte.[Words]), 0, cte.[Currency])
                + N' cents'
       END
FROM cte;

Returns:

Two dollars and 08 cents