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I’m designing a table in SQL Server 2008 that will store a list of users and a Google Maps co-ordinate (longitude & latitude).
Will I need two fields, or can it be done with 1?
What’s the best (or most common) data-type to use for storing this kind of data?
Take a look at the new Spatial data-types that were introduced in SQL Server 2008. They are designed for this kind of task and make indexing and querying much easier and more efficient.
More information:
MS TechNet: SQL Server 2008 Spatial Data Types,
MSDN: Working with Spatial Data (Database Engine).