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操作系统程序设计数据库热点技术综合架构与运维移动开发与应用 Web前端

关于关键词的检测结果，共 2973 条

【Oracle】 Oracle分区表管理

weijun1235 | 2018-09-27 21:42:05 | 阅读(2110) | 评论(0)

Oracle分区表管理--管理分区应对哪种表应用分区功能； 1.大于2GB的表; 2.含有1000万条记录以上的表，表中含有的数据越多，SQL操作的执行速度就会越慢; 3.将会含有大量数据的表; 4.强行拆分后可利于并行操作的表; &nb...【阅读全文】

【Oracle】表碎片整理时shrink和move的选择

weijun1235 | 2018-09-24 16:52:55 | 阅读(2190) | 评论(0)

一、表的占用空间大小释放原理背景：生产环境中，经常会遇到表由于数据不断插入，导致空间越来越大，由于前期配置问题，没有做分区或者其他优化，而且生产数据实时向表插入。要删除历史数据来释放空间。分析：（1）没做分区表：由于没有分区表，所以无法分块对表进行清理。（2）表实时插入数据，数据量大，要保留部...【阅读全文】

【Oracle】 Oracle 11g rac添加删除集群数据库

dbwatcher | 2018-09-13 17:46:43 | 阅读(4300) | 评论(0)

博客文章除注明转载外，均为原创。转载请注明出处。本文链接地址：http://blog.chinaunix.net/uid-31396856-id-5790357.html好记性不如烂笔头，记录添加集群数据库和删除集群数据库的关键步骤：主要是通过srvctl命令来管理集群的配置等，建议详细看下srvctl命令的使用。1、集群中删除数据库删除数据库实例srvctl sto...【阅读全文】

【Oracle】 2018年ocp最新题库：052新加的考试题整理-36

unix_5359 | 2018-08-08 11:48:19 | 阅读(1830) | 评论(0)

36、Which two are true about roles?A) A role can be granted a combination of system and object privileges and other roles.B) The CONNECT role Is granted automatically to a user when It Is created.C) Roles are owned by SYSTEM.D) The RESOURCE role Is granted the CREATE SESSION priv...【阅读全文】

【Oracle】 2018OCP 052最新考试题库及答案整理-35

unix_5359 | 2018-08-08 11:43:06 | 阅读(1700) | 评论(0)

35、Your database is using Automatic Memory Management.Which two SGA components must be managed manually?A) default buffer cacheB) redo log bufferC) large poolD) shared poolE) keep buffer poolAnswer:BE【阅读全文】

【Oracle】 OCP 052考试最新题库和答案整理-34

unix_5359 | 2018-08-03 14:07:03 | 阅读(1580) | 评论(0)

34、Which two can be backed up by using RMAN when a database Is open in ARCHIVELOG mode, so that media recovery can be performed If required?A) control filesB) password fileC) pfileD) online redo logsE) flashback logsF) data filesAnswer:AF【阅读全文】

【Oracle】 OCP认证052最新考试题和答案整理-33

unix_5359 | 2018-08-03 14:02:53 | 阅读(1220) | 评论(0)

33、Where Is backup metadata stored for use by Recovery Manager (RMAN)?A) In the control fileB) In the SYSAUX tablespaceC) in the SPFILED) in the SYSTEM tablespaceE) In the diagnostic destination fliesAnswer:A【阅读全文】

【Oracle】 ocp考试052题库变化，新考题及答案整理-32

unix_5359 | 2018-08-02 11:24:33 | 阅读(1110) | 评论(0)

32、 Examine these commands and their output:? SQL> SELECT * FROM emp;? ENO ENAME? ---- -----? 100 Adam? 101 Alan? SQL> INSERT INTO emp VALUES(102,'Ben");? 1 row created.? SQL> COMMIT;? Commit completed.? SQL> UPDATE emp SET ename='Bryan' WHERE eno...【阅读全文】

【Oracle】 ocp题库变了，052新题及答案整理-31题

unix_5359 | 2018-08-02 11:03:19 | 阅读(1640) | 评论(0)

31、Which two events always request the LGWR to write?A) when LGWR is notified by a server process that performs a Commit or ROLLBACKB) When PMON restarts a server processC) when DBWn writes dirty buffersD) when a log switch occursE) when a checkpoint occursAnswer:CD...【阅读全文】

【Oracle】 ocp题库变化，052最新考试题和答案整理-30

unix_5359 | 2018-08-01 13:52:02 | 阅读(1300) | 评论(0)

30、Which is true when a database instance is shut down?A. Only transactional and normal modes wait for all uncommitted transactions to commit or rollback and then close the database.B. Immediate, transactional, and normal modes all result in a checkpoint.C. Neither the immediate nor ...【阅读全文】

【Oracle】 2018OCP最新题库052新加考题及答案整理-27

unix_5359 | 2018-07-30 15:06:05 | 阅读(1640) | 评论(0)

27、Examine these facts about a database:1. USERS is the database default tablespace.2. USER1, USER2, AND USER3 have the CREATE SESSION privilege.3. They also have UNLIMITED QUOTA on the default tablespace USERS.4. They have no other privileges.Examine these commands:SQL> c...【阅读全文】

【Oracle】 OCP 052最新考试题库还有答案收集整理-26题

unix_5359 | 2018-07-30 14:35:05 | 阅读(1460) | 评论(0)

26、In which state can you back up a database in ARCHIVELOGMODE using RMAN?A. NOMOUNT, MOUNT, AND OPENB. NOMOUNT AND MOUNT ONLYC. OPEN ONLYD. MOUNT AND OPEN ONLYE. OPEN RESTRICTED ONLYCorrect Answer: D【阅读全文】

【Oracle】 OCP2018最新题库，052新题库及答案整理-25题

unix_5359 | 2018-07-27 15:19:27 | 阅读(1540) | 评论(0)

25、Which is true about logical and physical database structures? (Choose the best answer)A. An undo tablespace has a temp file instead of a data file.B. A segment can consist of extents of different sizes.C. A permanent tablespace can only contain tables segments and index segments....【阅读全文】

【Oracle】 OCP新题库，052新加的考试题及答案整理-24题

unix_5359 | 2018-07-27 15:00:21 | 阅读(1240) | 评论(0)

24、 YOUR DB_RECOVERY_FILE_DEST_SIZE Is 8G.Currently, 5G of the space Is used of which 4G consists of obsolete backups.You execute this command:SQL> ALTER SYSTEM SET db_recovery_file_dest_size=2G;What is the outcome?A) It changes DB_RECOVERY_FILE_DEST_SIZE to 5G.B) It chan...【阅读全文】

【Oracle】 OCP认证052考试，新加的考题还有答案整理-23题

unix_5359 | 2018-07-26 11:07:52 | 阅读(1020) | 评论(0)

23、Which two are true about data dictionary and dynamic performance views (v$ views)?A) All database users have access to ALL_* views.B) Data dictionary view output is subject to read consistency.C) The defining queries for Oracle supplied dynamic performance views are stored In the...【阅读全文】

【Oracle】 OCP题库更新，052新加的考试题及答案整理-22题

unix_5359 | 2018-07-26 10:46:09 | 阅读(880) | 评论(0)

22、You are planning a software installation for both Oracle Database 11g Release 1 and Release 2.You plan to have at lease one database for each release managed by Grid Infrastructure for a Standalone Server.Which three are true in this scenario?A) Oracle 11g Release 1 databases mus...【阅读全文】

【Oracle】 OCP认证考试052新加的考题及答案收集整理-21题

unix_5359 | 2018-07-25 11:36:05 | 阅读(960) | 评论(0)

21、Which two are true about roles?A) A role can be password-protected.B) A role can be granted to another role.C) Only one default role can be granted to a user.D) A role can be granted only multiple system privileges not multiple object privileges.E) A role can be created on...【阅读全文】

【Oracle】 OCP 052新加的考试题收集整理-第20题

unix_5359 | 2018-07-25 11:22:13 | 阅读(770) | 评论(0)

20、 Which is true about the SYSTEM and SYSAUX tablespaces?A) The SYSAUX tablespace can be made read-only but the SYSTEM tablespace cannot.B) Both tablespaces can be used for temporary storage if no temporary tablespace is defined.C) Only the SYSTEM tablespace contains data dictionar...【阅读全文】

【Oracle】 OCP考试新题整理-052新加的考题及答案-18

unix_5359 | 2018-07-24 11:43:05 | 阅读(800) | 评论(0)

18、You want to Install Oracle 11g database software and create a database on ASM Immediately after the Install.Your plan is to install both Oracle database and Grid Infrastructure.Which two are true in this scenario?A) Grid Infrastructure must be installed first.B) Both products ...【阅读全文】

【Oracle】 OCP换考题了，052新加的题库及答案整理-第17题

unix_5359 | 2018-07-23 12:05:03 | 阅读(810) | 评论(0)

17、Which two statements are true about tablespaces?A) A database can contain multiple undo tablespaces.B) A database can contain only a single temporary tablespace.C) A database instance stores undo data In the SYSTEM tablespace If no undo tablespace exists.D) A database instance...【阅读全文】

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