mysql中查询字段为null或者不为null的sql语句怎么写？
标签：怎么 from log sch span color where ble 不为
mysql中查询字段为null或者不为null的sql语句怎么写？
* from s_class_log WHERE class_uuid="50f3b8ecde184f22ac6bd7304b388b60" AND course_schedules_uuid="940991bff18d4122a4a6471b61ef18f2" and remark_status is not null