dbset.FromSqlRaw Data is Null. This method or property cannot be called on Null values.
常用sqlScript會遇到，基本上會遇到sql 端會有null 情況，而在對應的T class，轉型不過去，除非在某型別加上nullable，記錄一下，若有錯請指教一下，謝謝。
https://stackoverflow.com/questions/55883704/entity-framework-core-sqlnullvalueexception-data-is-null-how-to-troubleshoo
