oracle 判断字段是否为null

 select * from t_botnet where botnet_note_c = nullhtml 没有返回任何结果。post    select * from t_botnet where botnet_note_c is nullhtm 返回正确结果。blog 转载于:https://www.cnblogs.com/peterpanzsy/archive/2013/04/09/301

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