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A common issue in health related records (and I am sure other types of database records) is that a single patient may appear in the master index under multiple individual records. This may result in the patient having multiple ID's. It occurred to me that one way of managing this would be to build an MD5 hash of fixed information and then compare hashes. For example, we could assume that first name, last name, birth date and address would be consistent. They could be concatenated together in a single String, have spaces removed and all made lower case. The String could then be parsed through an MD5 algorithm. Whilst this is not fail-safe (addresses could change), it may help. I would really like some feedback on this or maybe a suggestion of an alternate methodology?
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