数据加载和卸载命令¶ 通过数据加载和卸载命令，您可以管理数据的加载和卸载。 暂存区¶ CREATE STAGE ALTER STAGE DESCRIBE STAGE DROP STAGE SHOW STAGES 文件格式¶ CREATE FILE FORMAT ALTER FILE FORMAT DESCRIBE FILE FORMAT DROP FILE FORMAT SHOW FILE FORMATS 外部卷¶ CREATE EXTERNAL VOLUME ALTER EXTERNAL VOLUME DROP EXTERNAL VOLUME UNDROP EXTERNAL VOLUME SHOW EXTERNAL VOLUMES DESCRIBE EXTERNAL VOLUME 管道¶ CREATE PIPE ALTER PIPE DESCRIBE PIPE DROP PIPE SHOW PIPES 加载和卸载数据¶ COPY INTO <table> COPY INTO <location>