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Oracle DB删除表
• 将表移至回收站
• 如果指定了PURGE子句，则可将表及其所有数据全部删除
• 使从属对象失效并删除表的对象权限
DROP TABLE dept80;
使用DROP TABLE语句可以将表移至回收站或从数据库中全部删除该表及其所有数据。
如果不指定PURGE子句，DROP TABLE语句就不会将使用的空间重新释放到表空间中供其它对象使用，而且该空间会继续视为用户的空间限额。删除表会使从属对象失效并删除表的对象权限。删除表后，在数据库中会失去表的所有数据以及与表关联的所有索引。
语法
DROP TABLE table [PURGE]
在该语法中，table是表的名称。
准则
• 删除表中的所有数据。
• 保留视图和同义词，但不再有效。
• 提交所有待定的事务处理。
• 只有表的创建者或具有DROP ANY TABLE权限的用户才能删除表。
注：使用FLASHBACK TABLE语句可从回收站中还原已删除的表。
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