下列哪个操作可以将表中的数据删除，并且不需要回滚删除后回收其所占有的空间，但表定义保留（）A、DELETE FROM EMP;B、TUNCATE TABLE EMP;C、TUNCATE TABLE EMP REUSE STORAGE;D、DROP TABLE EMP;E、以上所述都不正确
下列哪个操作可以将表中的数据删除，并且不需要回滚删除后回收其所占有的空间，但表定义保留（）
- A、DELETE FROM EMP;
- B、TUNCATE TABLE EMP;
- C、TUNCATE TABLE EMP REUSE STORAGE;
- D、DROP TABLE EMP;
- E、以上所述都不正确
相关考题：
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下列哪个操作可以将表中的数据删除,并且不需要回滚删除后回收其所占有的空间,但表定义保留() A.DELETE FROM EMP;B.TUNCATE TABLE EMP;C.TUNCATE TABLE EMP REUSE STORAGE;D.DROP TABLE EMP;E.以上所述都不正确
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删除emp表的全部数据，但不提交，以下正确的语句是（）A、DELETE * FROM. EMPB、DELETE FROM EMPC、TRUNCATE TABLE EMPD、DELETE TABLE EMP"
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You executed the following FLASHBACK TABLE command： FLASHBACK TABLE emp TO TIMESTAMP （’11：45’，’hh12：mi’）; Which two statements are correct？（）A、The FLASHBACK TABLE statement will not be written to the alert log file.B、The changes made to the EMP table since the specified time will be undone.C、The EMP table that was dropped by mistake from the database will be restored.D、The FLASHBACK TABLE statement will be executed within a single transaction.E、The FLASHBACK TABLE statement will not maintain the existing indexes on the EMP table. F、The list of transactions that have modified the EMP table since the specified time will be displayed.
有如下三步操作,并且均成功执行,请选择结果（） delete from emp; alter table emp add(addr varchar2(40)); rollback;A、emp表中数据处于回滚段中B、emp表中的数据被永久删除C、emp表中的数据没有变化D、原来的emp表中的数据被添加到新emp表中E、以上所述都不正确
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假定表A中有十万条记录，要删除表中的所有数据，但仍要保留表的结构，请问用以下哪个命令效率最高（）A、delete from a;B、drop table a;C、trunc table a;D、truncate table a;E、以上所述都不正确
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单选题Why would you use the following FLASHBACK TABLE command？（） FLASHBACK TABLE emp TO TIMESTAMP （’11：45’.’hh12：mi’）；A to undo the changes made to the EMP table since the specified timeB to restore the EMP table that was wrongly dropped from the databaseC to view the transactions that have modified the EMP table since the specified timeD to view the changes made to the EMP table for one or more rows since the specified time
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单选题下列哪个操作可以将表中的数据删除，并且不需要回滚删除后回收其所占有的空间，但表定义保留（）ADELETE FROM EMP;BTUNCATE TABLE EMP;CTUNCATE TABLE EMP REUSE STORAGE;DDROP TABLE EMP;E以上所述都不正确
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