ocp java

Preface In this chapter, we will explain part 1 of the Five Principles of s.o.l. I. D: Implementation of the Javascript language, and the principle of open and closed OCP (the open/closed principle ). The opening/closing principle is described as follows: Software entities (classes, modules, functions, etc.) shocould be open for extension but closed for modification.Software entities (classes, modules, methods, etc.) should be open to extensions

In my personal understanding, the inline view usually refers to the result of an SQL query as a data source for another query, usually after the from clauseAny indicates that any one of the datasets is equal to or.X> Any (select Sal from EMP where job = 'ana ')It is equivalent:Exists (select Sal from EMP where job = 'ana 'and x> Sal)Subqueries using all and any can always be replaced by embedded views, and the performance of this view is much better, because it uses the index of the connected ta

Tags: sha wildcard character cat nbsp path usermod list Basic Create a folderBasic command:Create/Modify/delete user Useradd/usermod/userdelCreate/Modify/delete user groups Groupadd/groupmod/groupdelModify the owning user/owning user group Chown/chgrpModify Permissions chmodCreate a folder mkdirCreate a file TouchSwitch Directory CDDelete files/directories RMDisplay list Ls/llEdit Vim/geditOpen File More/less/cat/tailView Help ManShow current working directory PWDMoving MVCopy CP/SCPPermissions:

Today I took the exam of 1z0-001 and 1z0-026, pass. So far, ocp8i's exams It's over. 1Z0-001 is very simple on the internet, but it takes a long time in the exam, which may be The topic description is too long, at the same time many options are very confusing, a little attention will choose Error. Maybe I've never written it in the wrong way, but I can tell. Not come out. The Pl/sql in 001 is really very simple, are all concepts, so there is no need for pl/sql To test 007, but it is estimated th

that all submitted data is written to the data file during a consistent shutdownInstance recovery time:Refers to the time required to push the last checkpoint (checkpoint location) of the data file to the latest SCN recorded in the control file. Administrators can control the time by setting the mttr target and resizing the redo log group.MTTR:Mean time to Repair, that is, the mean duration of repair. Refers to the average repair time for repairable products, which is the time between failure a

free space in the data block, the new state of the block is reflected in the bitmap. By using bitmaps, the Oracle DB You can increase the degree of automation in managing free space. Therefore, this type of space management is called "Automatic segment Space Management (ASSM)".Manual: This method specifies that you want to use an idle list to manage free space in a segment. A free list is a list of blocks of data that have space to insert rows. Because of this way of managing the space, you nee

: CannotInsert NULL into("SCOTT".) SALES "." channel_id ")And the V3 view canSql> Insert intoV3Values(1,2034, Sysdate,1,1,1);1row created. SQL> Commit;CommitComplete . SQL> Select * fromv3; prod_id cust_id time_id channel_id promo_id quantity_sold---------- ---------- ------------------ ---------- ---------- ------------- 1 2034 Geneva-JAN- - 1 1 15. Which SQL statements would display the value 1890.55 as $1,890.55? (Choose three.)A.SELECTTo_char (1890.55,'

Patch/one-off Patch Patch installation cases and failed rollback cases, daily management and maintenance of the PSU patch set installation case for Oracle 11.2.0.4 and the failure of rollback cases. Details of the course are as follows:01. Be familiar with Oracle software version number02. Mastering Oracle Patch Classifications03. Current PSU Release status04.opatch Patch tool and installation case05.interim patch/one-off Patch Minor patch installation case06.interim Patch/one-off Patch install

log file function and concept analysis, redo log routine maintenance and optimization optimization, Redo log Add/delete/mirror, ddl/dml operation and Redo relationship, Detailed update, truncate, select Redo process, Oracle Redo dump log file in-depth analysis and other daily management and maintenance. Details of the course are as follows:1. Redo log file function and concept analysis2. Redo Log status detailed and daily maintenance3. Add/delete/mirror of Redolog4. What to do if the log is inc

backup11. Incomplete recovery case based on point-in-time12. Incomplete recovery case based on cancellation13. An incomplete recovery case based on SCN14. How to recover one or more corrupted data files in archive mode15. How to recover one or more corrupted data files in non-archive mode16. Restore deleted after tablespace offline backup in archive mode17. Recovery cases where data files are missing and no backups are in archive mode18. Incomplete recovery case for corrupted archive logs19. Lo

-flashback drop,flashback Recovery case-flashback query,flashback version query,flashback Transaction Query, Flashback Recovery Case-flashback table,flashback Recovery case-flashback Data Archive common features Oracle Flashback Flashback Recovery Management, the course content is detailed as follows:Flashback conceptFlashback parameter setting and archive modeFlashback Recovery Case-flashback DatabaseFlashback Recovery Case-flashback DROPFlashback Recovery Case-flashback QueryFlashback Recove

set of Oracle Tutorial Training learning Oracle Database Export and import logical backup recovery parameters and common syntax, configure the production environment of logical automatic backup strategy, EXP/IMP production environment data migration process and considerations, exp/ IMP Data migration case, exp/imp migration process Character Set processing, Exp/imp optimization method, Exp/imp common problems and solutions.Oracle database logical Backup to restore the migration of exp and IMP,

parameter descriptionTable space Performance vs. non-standard block size tablespace creationTable space Migration process (data files vs. objects)Table space Maintenance and status checksOracle-managed files (OMF)What if the system and the Sysaux table space are full?How do I handle a temporary tablespace when it is full?Default temp table space too large to handleThis article is from the Oracle Database tutorials Blog, so be sure to keep this source http://oracle13c.blog.51cto.com/8020378/1879

and permissions, Audit function installation/migration, audit function data cleaning, audit control, revocation, closure, Standard and high-precision database audit configuration and operation of the command and other daily management and maintenance. Details of the course are as follows:01. Audit Function Introduction02. Audit-related parameters and views03. Audit level and permissions04. Installation of Audit function05. Migration of Audit functions06. Cleanup of Audit function data07. Contro

types, the importance of Oracle Backup, Oracle Backup strategy, how Oracle develops the right backup strategy to ensure efficient backup , Oracle Backup classification, MTTR,MTBR,MTTF, Oracle physical Backup and logical backup, Oracle Backup recovery tools, backup optimization on Oracle database configuration, several types of data structures that are important in Oracle backup and recovery, An Introduction to Oracle Restore and recovery, and an introduction to the Oracle DB instance recovery p

Oracle Database Rman Backup Recovery Foundation, such as Rman role and architecture, Nocatalog and Catalog Introduction and catalog configuration, detailed the use of Rman, Detailed instructions for Rman common commands List,report, Backup,configure,set,crosscheck,validate,change,delete,restore,recover,switch, Blockrecover, convert, etc. use.Oracle Rman Backup Recovery 1-BASIC, the course content is as follows:1. Rman Function and Architecture2, Nocatalog and catalog introduction and catalog Co

Oracle Video tutorial, wind Brother this set of Oracle Tutorial Training learning Oracle Database Logminer related concepts and use of detailed, Logminer Use the data dictionary analysis of the source database, extract the Logminer dictionary to the dictionary file to analyze, logminer How to view the log analysis results, Logminer log Mining Case 1-analysis of the Production system table data loss reasons, Logminer Log Mining Case 2-loss of table data due to recovery of DML errors, Logminer lo

Brother this set of Oracle Tutorial training to learn Oracle data pump EXPDP/IMPDP concept and command parameters and use method, configure the production environment of logical automatic backup strategy, EXPDP/IMPDP production environment data migration process and actual case, character set, version compatibility, how to stop EXPDP and IMPDP background processes, how to clean up the data pump job, how to do trace trace analysis of EXPDP/IMPDP and usage summary.Oracle Database logical Backup R

Tags: Oracle performance tuning Oracle database optimization Oracle Optimization training Oracle Performance Tuning Oracle Database Performance TuningCourse IntroductionWind Brother Oracle Video tutorial , dbms_job use case explanation, Dbms_job time parameter Summary, Oracle Scheduler Introduction, Oracle Scheduler create job,oracle Scheduler management job,oracle Scheduler Job advanced features, ORACLE Scheduler System maintenance task description.Video Learning Address:Http://edu.51cto.com/co

,T.extent_management Extman, T.segment_space_management SegmanFrom Dba_tablespaces T,(select Tablespace_name, sum (bytes) allocated, COUNT (file_id) datafiles from Dba_data_files Group by Tablespace_name) d,(select Tablespace_name, sum (bytes) free from Dba_free_space Group by Tablespace_name) F,(select Tablespace_name, sum (bytes) used from Dba_segments Group by Tablespace_name) uwhere T.tablespace_name = D.tablespace_name (+)and T.tablespace_name = F.tablespace_name (+)and T.tablespace_name =