drop DATABASE IF EXISTS 數據庫名 CASCADE;
使用CASCADE ,表示強制刪除。
1.Presto簡介 Presto是由Facebook開源,完全基於內存的並行計算以及分佈式SQL交互式查詢引擎。它可以共享Hive的元數據,然後直接訪問HDFS中的數據,同時支持Hadoop中常見的文件格式比如文本,ORC
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