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Let’s say, I have a table objects. It has fields id, name, misc.
How can I find rows with similar or duplicate name values? I can see that MySQL can be used itself for searching duplicate values, but not for similar ones, eg. PHP Hypertext Preprocessor and PHP Hypertext Postprocessor (~90% of source value).
Can it be performed with Sphinx? And how?
I don’t know the details of Sphinx, but what you’re talking about sounds like calculating Levenshtein Distances. Quickly googling for “sphinx php levenshtein” I found this thread which describes a method that might work for you. Hopefully that gives you something to go on.