June 20, 2009

Find out the Binary, ASCII and Character of a Given String in SQL Server




When you are storing data inside fields like ‘address’, there are bound to be unusual characters in it which make way due to poor validation rules. A good way to look for them is to convert your string to varbinary.

I came across this cool query from Peter which shows how to convert a string to varbinary and find out the Binary, ASCII and Char of each character in the string. Here’s the query:

DECLARE @MyAddress varchar(35)
SET @MyAddress = 'CANTB RY EA%T P.O.Box 55343'

DECLARE @BIN AS VARBINARY(100)
SET @BIN = convert(varbinary(100),@MyAddress)

SELECT SUBSTRING(@BIN, Number, 1) AS Binary,
ASCII(SUBSTRING(@BIN, Number, 1)) AS ASCII,
CHAR(ASCII(SUBSTRING(@BIN, Number, 1))) AS Character
FROM
master..spt_values
WHERE Type = 'p'
AND Number BETWEEN 1 AND DATALENGTH(@BIN)

OUTPUT

image


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About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

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