在「Fuzzy Name Matching in Postgres」這邊看到 PostgreSQL 下怎麼設計 Fuzzy Matching 的方式，文章裡用的方法主要是出自 PostgreSQL 的文件：「F.15. fuzzystrmatch」。
文章最後的解法是 Soundex + Levenshtein。
翻了一下資料，這個領域另外有 NYSIIS (New York State Identification and Intelligence System)：
The New York State Identification and Intelligence System Phonetic Code, commonly known as NYSIIS, is a phonetic algorithm devised in 1970 as part of the New York State Identification and Intelligence System (now a part of the New York State Division of Criminal Justice Services). It features an accuracy increase of 2.7% over the traditional Soundex algorithm.
以及 Metaphone：
Metaphone is a phonetic algorithm, published by Lawrence Philips in 1990, for indexing words by their English pronunciation. It fundamentally improves on the Soundex algorithm by using information about variations and inconsistencies in English spelling and pronunciation to produce a more accurate encoding, which does a better job of matching words and names which sound similar. As with Soundex, similar-sounding words should share the same keys. Metaphone is available as a built-in operator in a number of systems.
不過這些都是以英文為主，中文的沒特別翻到...
