oracle data guard 12c

The new features of In-database archiving are introduced in Oracle Database 12c, which allows users to archive data by marking data rows on the table as inactive inactive. These inactive data rows can be compressed into one optimization and are not visible to the app by defa

reuse autoextend on next 640k maxsize unlimited undo tablespace undotbs1 DataFile'/u12/app/oracle/oradata/db12/undotbs01.dbf'size 200m reuse autoextend on next 5120k maxsize Unlimited enable pluggable database seed File_name_convert = ('/u12/app/oracle/oradata/db12', '/U12/APP/ORACLE/ORADATA/DB12/PDB1') system datafiles size 125m aut

Insert null into ( "ROGER". " TEST ". "ID") You can see that the ID column will automatically grow by default, and before 12c, Oracle can only do this with sequence. We can also see that, in this case, a null value cannot be inserted. NULL); 1:ora-value So is it really possible to insert a null value for the identity column? Actually, but you have to do this: Sql>CreateTable Test1

The company installs an Oracle 12c test environment, is ready to export the online library to test performance, the results of the test library of the character set selected Al32utf8, a look at the line is ZHS16GBK, or to maintain the same, and then record Al32utf8 ZHS16GBK character Set process: first, the most important thing: backup. Back up your data. Don't f

ArticleDirectory New Features Database architecture On July 6, June 26, 2013, Oracle Database 12C was officially released. The first version was 12.1.0.1.0. The first download platforms were Linux and Solaris: Oracle official: Http://www.oracle.com/technetwork/database/enterprise-edition/downloads/index.html Like the previous 10g,

This article describes how to use simple CDC for Oracle ODI 12c. It is the simplest kind of CDC. In this mode, each CDC table change is captured independently, and there is no need to consider data consistency between multiple tables with primary foreign key reference relationships.1. Import Knowledge ModulePrior to this, all the knowledge modules have been impor

------------------------- ------------------------- -------- ---------- -----------P_andy idx_pandy_id unusable 0 1--Rebuilding the indexsql> ALTER index IDX_PANDY_ID rebuild;Index altered.--View index statusSql> Select Table_name,index_name,status,blevel,leaf_blocks from user_indexes where index_name = ' IDX_PANDY_ID ';table_name index_name STATUS Blevel leaf_blocks------------------------- ------------------------- -------- ---------- -----------P_andy idx_pandy_id VALID 0 1--Truncate multiple

Tags: val alter err enhanced nbsp char des create visibleIn Oracle 11g R1, Oracle introduces some nice enhancements in the form of invisible indexes and virtual fields. Inheriting the former and carrying forward, Oracle 12c introduces the idea of invisible fields. In previous releases, in order to hide important

This article mainly introduces the basic management of CDB and PDB, data source Oracle official.Basic concepts:Multitenant Environment: Multi-tenant environmentCDB (Container database): DB containerPD (Pluggable database): pluggable databasesCDB vs. pdb diagramCOMMON users (ordinary users): often built on the CDB layer, user name in C # #或c # #开头;Local Users: Only the PDB layer is established, and container

has the lowest impact on the performance of the master database.From the above analysis, we can use ARCH or LGWR in this mode.If ARCH is used, SYNC is required ).When LGWR is used, it can be SYNC or ASYNC.Standby redo is dispensable.Sample Configuration:Alter system set log_archive_dest_2 = 'service = db_phystdby lgwr sync VALID_FOR = (ONLINE_LOGFILES, PRIMARY_ROLE) DB_UNIQUE_NAME = PHYSTDBY '; References: Important configuration parameters of Oracle

NULL into ("ROGER".) TEST "." ID ") You can see that the ID column can automatically grow by default, and Oracle can only do this through sequence before 12c. In addition, we can see that in this case, the null value cannot be inserted. Sql> ALTER TABLE test modify (id default null);ALTER TABLE test modify (id default null)*ERROR at line 1:Ora-30674:identity column cannot have a default value So is it r

One, DB default character set Al32utf8Specify the database character set when you create the database. Starting from Oracle Database 12c Release 2, if you use Oracle Universal Installer (OUI) or Oracle database Configuration Assistant (DBCA) to create a database and then the default database character set used is the U

Tags: blog http io using for file data CInstallation Checklist Hardware checklistThe next update.Operating system Check list OS version support supported releases, kernels, etc. (distribution, release, kernels, and packages) for the x86-64 system Linux 6 minimum operating system requirements LI>OPENSSH Installing Oracle Linux 6 supported distributions:

temporary space 2 Create Temporarytablespace pdbadmin_temp3Tempfile'D:\App\Oracle\oradata\orcl\pdborcl\pdbadmin_temp01.dbf' 4 size 32m5Autoextend on 6 Next32m MAXSIZE Unlimited7 extent management Local;8 9 Ten --Create a data table space One Createtablespace pdbadmin_data A Logging -DataFile'D:\App\Oracle\oradata\orcl\pdborcl\pdbadmin_data01.dbf' - size 1024

-party software products.3. The physical standby database supports any type of data object and data type.4. The logical standby database is open to perform operations such as querying while keeping data synchronized.5. In maximum protection mode, you can ensure that 0 of the data is lost.Second, the structure

has been strengthened again, we can not set the NOT NULL here, greatly reducing the possible error operationSee the following experimental processCREATE table T, where more than 1 million rows of data.Sql> Select COUNT (*) from T; COUNT (*)---------- 1454256Add a column directly to the table (not set NOT NULL)Sql> ALTER TABLE t add MRDAI1 number default 10000; Table altered. elapsed:00:00:00.03The speed is swift. And, of course, as in 11G.After the setting is complete, if it is a newly inser

A note from Data Guard Broker recently used A Broker to configure and manage Data Guard (Oracle version: 10.2.0.1.0). Earlier databases basically did not set db_domain. When database link is used, global_names = true is enabled, and db_domain is also set. Therefore, the Brok

Data guard is a solution provided by Oracle to ensure high availability, data protection, and disaster recovery of enterprise data. 1. Data guard configuration

Many times, we do a small batch of data migration will use the data pump, but 12C we want to configure TNS to specify the PDB import, but the public service we are through the cluster using SRVCTL to create. At this time preferred instances may have multiple values. If your DMP file is not mounted through shared storage, then DMP must be uploaded to a node to sto

Sheng Ge 1.1 million drops on Data Guard past and present Note: More details are available ~ 116 page From birth-> out-of-service full-lifecycle DG edition [departure form] 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131228/220155DM-0.jpg "/>Introduction: Oracle Data