摘要： Define the purpose of tablespaces and data files #数据库中的block是操作系统的2的n 次幂倍，如0, 2, 4, 8 .... #database 中的一个table 至少要有一个segment. # SYSTEM tablespce created with database , contains the data dictionary, c... 阅读全文

摘要： Explain the purpose of online redo log files Record all changes made to data Provide a recovery mechanism at least two groups required online redo log file group : identical copies of online redo lo... 阅读全文

摘要： uses of the control file a. binary file b. define current state of physical database d. 只要data file 和redo log file 不丢，control file 还是有可能恢复的 ---------------------------------- cd dbs ls -al strings spf... 阅读全文