SQL SOUNDEX function

The SQL SOUNDEX one of the String Function, which returns the four digit soundex code of the user specified character expressions.

In this article, we will show you, How to write or use this SOUNDEX Function with an example.

SQL Server SOUNDEX Syntax

The basic syntax of the SQL Server SOUNDEX Function is as shown below:

SELECT SOUNDEX(Character_Expression)
FROM [Source]

This Soundex function convert any given characters expression into four digit code based on the string sound. It will place first character from the character_expression as first digit, and remaining are number. In some cases, it will add 0’s to the end to complete four digit code.

SQL SOUNDEX Function Example 1

The following list of examples will help you to understand the Soundex function.

-- SQL Server SOUNDEX Function
DECLARE @Str VARCHAR(50)
SET @Str = 'SQL Server'

SELECT SOUNDEX(@Str) AS SoundText 

SELECT SOUNDEX('SQL') AS SoundText 

SELECT SOUNDEX('Sales') AS SoundText 

SELECT SOUNDEX('Suresh') AS SoundText

OUTPUT

SQL Server SOUNDEX Example 2

In this example,We are going to return the SOUNDEX code of the multiple character expressions, along with the difference. I suggest you to refer Difference Function article to understand the same.

-- SQL Server SOUNDEX Function
SELECT SOUNDEX('SQL Server') AS Code1,
       SOUNDEX('SQL') AS Code11,
	   DIFFERENCE('SQL Server', 'SQL') AS Difference1 

SELECT SOUNDEX('SQL') AS Code2,
       SOUNDEX('Suresh') AS Code22,
	   DIFFERENCE('SQL', 'Suresh') AS Difference2

SELECT SOUNDEX('Suresh') AS Code3,
       SOUNDEX('Srsh') AS Code33,
	   DIFFERENCE('Suresh', 'Srsh') AS Difference3

OUTPUT

Thank You for Visiting Our Blog