How do I remove a single production yield from specifically tundra hills? I'm not at all a modder and only know how to modify or repurpose lines from .sql files, so this is what I came up with to no success:
Code:
UPDATE Terrain_Yields
SET Yield = '-1'
WHERE TerrainType = 'TERRAIN_TUNDRA' AND 'REGION_HILLS' AND YieldType= 'YIELD_PRODUCTION';