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MySQL 5.5 brought many performance enhancements and expanded the feature set of the popular open-source RDBMS.

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How do Application Like Yelp Retrieve distance information from data base efficiently

For example, say I have a table: Business(BusinessID, Lattitude, Longitude) All are indexed of course. Also there are 1 million records Say I want to find businesses closest to 106,5, for example, ...