MySQL SOUNDEX is one of the String Function, which is to return the Soundex code of a given string. Generally, it returns the four digits standard code as an output of Soundex. However, this is not the case for the long string arguments.
As the name suggests, the string SOUNDEX in MySQL returns the code based on the string sound. I mean, if two strings sound identical, then the Soundex value will be identical too.
MySQL SOUNDEX Syntax
The basic syntax of the SOUNDEX Function in MySQL is as shown below:
SELECT SOUNDEX(String_Expression) FROM [Source]
MySQL SOUNDEX Function Example
The Soundex Function returns the Soundex code value of a user-specified string expression. The following String Soundex query shows you multiple ways to use this function.
Let me show you another example for better understanding. Within the last statement, we used a NULL value. Remember, SOUNDEX returns NULL for NULL argument value.