Haversine formula using SQL server to find closest venue - vb.net

Question

I am grabbing a postcode from a form. I can then convert this postcode to lng,lat coordinates as I have these stored in a table.

SELECT lng, lat from postcodeL

Answer 1

Alternatively uou could also use SQL Server 2008 geography datatypes. If you currently store the longitude/latitide as varchar() in the DB, you will have to store them as geograpghy datatype and then use a function like STIntersects() to get the distance.