DIFFERENCE

DIFFERENCE is a SQL function used primarily in the SOUNDDEX system. It compares two SOUNDEX values and returns an integer that represents how similar the values are, ranging from 0 to 4. The larger the difference, the less similar the values are.

Example

SELECT DIFFERENCE('test', 'tost')

Output

2

Explanation

The DIFFERENCE function returns an integer that represents the difference between the SOUNDEX values of two strings. In the example, the difference between ‘test’ and ‘tost’ is 2, indicating a moderate match according to the SOUNDEX system. This function is useful for comparing the similarity of words based on their phonetic sounds.

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