I am looking for GIS DB, to work with 800 millions of GIS data. I want to make my work more simple easy by doing it in spatial DB. I want to work with Geography and not on Geometry. Please suggest some good and easy to understand the db. I use MAPINFO for mapping.
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You can use PostgreSQL, MS SQL server Express or Oracle XE. They are all free, but the two latter are restricted in terms of how much data they can work with. 800 million records of some datatype may be too much for them (?). In that case go with PostGreSQL. All 3 of them can be directly accessed from MapInfo.