Distance definition on a string column, like for instance Levenshtein distance. Additional parameters can be set based on the selected distance function.
The Jaro-Winkler distance is a common measure for the difference between two strings. It is important to note that it is not actually a distance metric because it doesn't obey the triangle-inequality.
N-gram Tversky Distance (Tanimoto/ Dice)
In contrast to the edit distances the n-gram Tversky index does not rely on single-operation counts, instead it models relations between neighbored letters.
The Levenshtein distance is one of the famoust string metrices for measuring the difference between two strings. It is the minimum number of operations (i.e. deletions, insertions or substitutions) peformed on a single character to tranform one of the strings into the other.
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