UNDROP <object>¶ 将指定对象恢复到系统。 另请参阅:CREATE <object>、DROP <object>、SHOW <objects> UNDROP 命令¶ 有关具体语法、使用说明和示例,请参阅: 组织对象: UNDROP ACCOUNT 账户对象: UNDROP DATABASE 数据库对象: UNDROP DYNAMIC TABLE UNDROP EXTERNAL VOLUME UNDROP ICEBERG TABLE UNDROP SCHEMA UNDROP TABLE UNDROP TAG