2018年9月4日

OCP换题库了，最新052考试题库及答案整理-29

摘要： 29、Which two are true about undo tablespaces? A) They always retain undo for the time period defined by UNDO_RETENTION. B) They must have only one dat 阅读全文

posted @ 2018-09-04 15:24 alice9313 阅读(162) 评论(0) 推荐(0)

OCP换题库了，最新052考试题库及答案整理-28

摘要： 28、USER1. EMP has a referential Integrity constraint defined on EMP.DNO that references USER1.DEPT.DNO. user1 executes these commands: SQL> UPDATE dep 阅读全文

posted @ 2018-09-04 14:45 alice9313 阅读(547) 评论(0) 推荐(0)

OCP换题库了，最新052考试题库及答案整理-27

摘要： 27、Which two are true about data dictionary views? A) ALL or USER prefixed views display output that are subsets of the output from the DBA prefixed d 阅读全文

posted @ 2018-09-04 13:42 alice9313 阅读(146) 评论(0) 推荐(0)

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