| model object column category row_count entity_count non_null_count null_count min_time max_time time_source | |
| table table1 value FIELD 20 1 20 0 0 19 scan | |
| table table2 site TAG 20 20 19 1 0 19 scan | |
| table table2 rack TAG 20 20 20 0 0 19 scan | |
| table table2 sensor TAG 20 20 20 0 0 19 scan | |
| table table2 reading FIELD 20 20 15 5 0 19 scan |