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SQL Anywhere 11.0.1 » SQL Anywhere Server - SQL Reference » Using SQL » SQL functions » SQL functions (A-D)


DIFFERENCE function [String]

Returns the difference in the SOUNDEX values between the two string expressions.

DIFFERENCE ( string-expression-1, string-expression-2  )
  • string-expression-1   The first SOUNDEX argument.

  • string-expression-2   The second SOUNDEX argument.




The DIFFERENCE function compares the SOUNDEX values of two strings and evaluates the similarity between them, returning a value from 0 through 4, where 4 is the best match.

This function always returns some value. The result is NULL only if one of the arguments are NULL.

See also
Standards and compatibility
  • SQL/2003   Vendor extension.


The following statement returns the value 3.

SELECT DIFFERENCE( 'test', 'chest' );