用:is null 或者 is not null
如:select * from t_finance_mobilecard where rank1='0004' and (COLLECTION_OPEN_STATUS<>2 or COLLECTION_OPEN_STATUS is null);
用:is null 或者 is not null
如:select * from t_finance_mobilecard where rank1='0004' and (COLLECTION_OPEN_STATUS<>2 or COLLECTION_OPEN_STATUS is null);