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ASCII (Transact-SQL)

Returns the ASCII code value of the leftmost character of a character expression.

Topic link icon Transact-SQL Syntax Conventions

ASCII ( character_expression )
character_expression

Is an expression of the type char or varchar.

The following example assumes an ASCII character set and returns the ASCII value and CHAR character for each character in the string Du monde entier.

SET TEXTSIZE 0
SET NOCOUNT ON
-- Create the variables for the current character string position 
-- and for the character string.
DECLARE @position int, @string char(15)
-- Initialize the variables.
SET @position = 1
SET @string = 'Du monde entier'
WHILE @position <= DATALENGTH(@string)
   BEGIN
   SELECT ASCII(SUBSTRING(@string, @position, 1)),
      CHAR(ASCII(SUBSTRING(@string, @position, 1)))
    SET @position = @position + 1
   END
SET NOCOUNT OFF
GO

Here is the result set.

----------- - 
68          D 
              
----------- - 
117         u 
              
----------- - 
32            
              
----------- - 
109         m 
              
----------- - 
111         o 
              
----------- - 
110         n 
              
----------- - 
100         d 
              
----------- - 
101         e 
              
----------- - 
32            
              
----------- - 
101         e 
              
----------- - 
110         n 
              
----------- - 
116         t 
              
----------- - 
105         i 
              
----------- - 
101         e 
              
----------- - 
114         r

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