View and modify the Oracle encoding format and modify the oracle encoding formatZookeeper first checks the encoding of the oracle databaseSQL> select * from nls_database_parameters where parameter = 'nls _ CHARACTERSET ';PARAMETER--------------------VALUE--------------------NLS_CHARACTERSETAL32UTF8This is derived from props $, which indicates the character set of
Oracle date weekly explanation and weekly start and end time calculation, oracle End Time
1 ORACLE weekly knowledge description
1.1 date formatting Functions
TO_CHAR (X [, FORMAT]): Convert X to a string in FORMAT. X is a date, and FORMAT is a string that specifies the FORMAT used for conversion. The FORMAT is related to the week W, WW, IW, D, FMWW.
WThe week o
Oracle batch export AWR reports, oracle export awr
Work requirement: in the project, all the AWR reports in the production database must be dumped and imported to the database for testing convenience. The AWR report in the test database needs to be exported one by one based on dbid and Instance name. If you encounter a lot of problems with the RAC system, it will be very troublesome. I found some scripts o
Oracle cross-database query replication table data distributed query, oracle
Method 1:
Currently, most databases require distributed queries. The following describes how to configure cross-database access in oracle.
For example, there are two database servers and two databases are installed. Database server A and B. Now, database A accesses database B.
Step 1Conf
Oracle Performance Analysis 8: Creating indexes and oracle performance indexes
When creating an index, we often want to estimate the index size to evaluate the impact on the existing engineering environment. We also hope that the index creation process will minimize the impact on the running engineering environment, you can also view the index status.Estimate index size
The best way to estimate the index si
In oracle, how does one view the permissions granted to a role ?, Oracle Grant
In oracle, how does one view the permissions granted to a role?
Select * from dba_role_privs; grant roles to users and other roles
Select * from dba_sys_privs; grant system permissions to users and other roles
Select * from dba_tab_privs; all permissions on objects in the database
Ref
ArticleDirectory
Making Oracle Spatial your default geometry Schema
How does ArcSDE use Oracle Spatial? (How to use Oracle Spatial in ArcSDE) ArcSDE supports Oracle Spatial or Oracle locator for storing and managingGeometry in an
If the database uses the ASM file system for management, it may be difficult to download and upload files. Even if the asmcmd tool is used, there is no command similar to CP to copy files, oracle provides FTP to manage a series of ASM files. Using FTP with Oracle ASM fileshttp: // docs.oracle.com/cd/e11882_01/appdev.#/e23094/xdb22pro.htm?adxdb5537
Oracle Automati
Oracle's DB instance is a set of background processes and memory structures, and the memory structure consists of the system global area and the program global Zone.#修改SGA和PGA的配置文件, usually in/. sgz_max_size=64m, sga_target=64m, pga_aggregate_target parameters in/oracle/admin/spfile/init.ora, or alter system set in Sqlplus Sga_max_size=64m Scope=spfile; After modification, restart the database and the service takes effect.System global Area (SGA): A p
Tags: share development client Analytics admin hint Dev Oracle strConfiguring the Environment Oracle Service SideOracle_winx64_12c_database.iso Oracle ClientInstantclient-basiclite-nt-12.1.0.1.0.zip Integrated development EnvironmentPL/SQL Developer 10.0.5.1710 Configuration steps Make sure that Oracle has completed th
There are four common principles in transactions that all databases must adhere to, the acid principle, and a brief overview of how Oracle achieves these four principles. I. atomicity (atomicity): A transaction is either all executed or none of the execution In Oracle, when we make a change, an undo record is automatically created to describe how to undo the change. That is, when executing into the middle o
Tags: oracle redo undo Imu I. OverviewWe know that in Oracle, every modification of a piece of data produces a redo (that is, redo, which records the modified content). The goal is to back up the modified data to facilitate future re-work. Now there is a problem. Whenever data is modified in Oracle, Redo is generated, and these redo are stored in a buffer called
Oracle Video Tutorial Goals Oracle Video tutorial, wind Brother this set of Oracle Tutorial Training learning Oracle Database about Flashback concept, Flashback parameter setting and archive mode, Flashback recovery case-flashback Database,flashback Drop,flashback query,flashback version query,flashback Transaction qu
General framework of Oracle, Oracle framework
The physical structure of Oracle includes parameter files, control files, data files, redo log files, archive files, and password files.
1.1 parameter file
This includes a large number of settings that affect the functions of Oracle database instances, as shown in the fol
Enable Oracle NUMA support in Oracle 11gR2
Enable Oracle NUMA support in Oracle db 11gR2
Reference Original:Enable Oracle NUMA support with Oracle Server Version 11gR2 (Document ID 864633.1)Applicable:Oracle Database-Enterprise Ed
Label:Nothing to do, today under the virtual machine installed a single instance of ORACLE11G, hereby record sharing! Software used: Virtualbox-4.0.8-71778-win.exe Oracle Linux 6.3 (V33411-01.ISO) oracle11g (p10404530_112030_linux-x86-64_ 1of7.zip, P10404530_112030_linux-x86-64_2of7.zip) First, install Linux. Virtual machine configuration: 1g memory, 30g HDD, one NIC (host-only mode)Check memory condition # grep Memtotal/proc/meminfo # grep Swaptotal/
Share: Oracle System Variable Function usage instructions, oracle VariablesIn Oracle databases, Oracle System variable functions are frequently used. Let's share the usage of Oracle System variable functions.
Oracle functions are
Oracle cross-database query replication table data distributed query introduction, oracle
Method 1:
Currently, most databases require distributed queries. The following describes how to configure cross-database access in oracle.For example, there are two database servers and two databases are installed. Database server A and B. Now, database A accesses database B.
Step 1: configure the tnsnames. ora File (T
ORACLE multi-Table query optimization and ORACLE Optimization
ORACLE has a high-speed buffer concept. This high-speed buffer is used to store the executed SQL statements. Therefore, oracle has to do a lot of work when executing SQL statements, such as parsing SQL statements and estimating index utilization, bind variab
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