1．删除空数据库
hive>drop database db_hive2;
2．如果删除的数据库不存在，最好采用 if exists判断数据库是否存在
hive> drop database db_hive; FAILED: SemanticException [Error 10072]: Database does not exist: db_hive hive> drop database if exists db_hive2;
3．如果数据库不为空，可以采用cascade命令，强制删除
hive> drop database db_hive; FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. InvalidOperationException(message:Database db_hive is not empty. One or more tables exist.) hive> drop database db_hive cascade;
原文：https://www.cnblogs.com/Tunan-Ki/p/11795733.html