GV5_isnull

select countryCode as "country_code", ISNULL(GV5_1, 0) as GV5_1, ISNULL(GV5_2, 0) as GV5_2, ISNULL(GV5_3, 0) as GV5_3, ISNULL(GV5_4, 0) as GV5_4, ISNULL(GV5_5, 0) as GV5_5
FROM [UWWTD].[v1r2].[CP_source]

No data