单选题
You work as a database administrator for Supportcenter.cn. Your database is in NOARCHIVELOG mode. The database has been configured with three redo logs groups， and there have been five log switches. You lost one non-system-critical data file from your database. Which method would you use to recover the data file？（）
发布日期：2020-04-10
Restore all the data files and open the database
Create the data file and perform tablespace recovery
No need to restore any file， just recover the database
Restore only the system data file and recover the database
Restore only lost date file and performtablespacerecovery
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