如果要删除表组，得先确认表组中没有表。具体方法就是从表组中删除表，或者将相关表的表组属性清空。

    示例如下：

    1. obclient> show tablegroups;
    2. +-----------------+------------+---------------+
    3. | Tablegroup_name | Table_name | Database_name |
    4. +-----------------+------------+---------------+
    5. | oceanbase       | NULL       | NULL          |
    6. | tpcc_group      | cust       | tpccdb        |
    7. | tpcc_group      | dist       | tpccdb        |
    8. | tpcc_group      | hist       | tpccdb        |
    9. | tpcc_group      | nord       | tpccdb        |
    10. | tpcc_group      | ordl       | tpccdb        |
    11. | tpcc_group      | ordr       | tpccdb        |
    12. | tpcc_group      | stok       | tpccdb        |
    13. | tpcc_group      | ware       | tpccdb        |
    14. +-----------------+------------+---------------+
    15. 9 rows in set (0.01 sec)
    17. obclient> drop tablegroup tpcc_group;
    18. ERROR 4615 (HY000): tablegroup is not empty
    19. obclient>