Migrate datatypes from geometry to geography in MS SQL

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I have three ESRI feature classes (POINT, LINE and POLYGON) that contain a geometry datatype column. I'm looking for a way that I can convert & project from Geometry datatype to Geography.

Does anyone know of a tool or script I can use to convert all records permanently?

My research has show that I will not be able to do this with a simple SQL statement. So i'll probably need to use an Arc Toolbox or Python script or something.



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