Introduction to Oracle 11G Virtual Column [html] Oracle 11G Virtual Column Oracle 11G introduces Virtual columns in the table, Virtual Column is an expression, which is calculated at runtime, the virtual column value cannot be updated because it is not stored in the database. Syntax for defining a VIRTUAL column: column_name [datatype] [generated always] AS [expr
How to modify the Oracle 11G password after the expiration of 180 days, oracle11g
Due to the new features of Oracle11G, often encounter the use of sqlplus login oracle Database prompts "ORA-28002: 7 days after the password will expire" and so on. The default password expiration limit when creating a user in Oracle 11G is 180 days, if the user password is not modified more than 180 days, the user cannot log
After the CentOS system is installed, you can start the installation of Oracle 11g. First, you must make some preparations.
Use commands to create an Oracle account and corresponding user groups
Create a folder and grant the Oracle user permissions, as shown in the commandUse the root account to make a series of changes to the corresponding system files, and use the oracle account to set directories such as ORACLE_SID, ORACLE_BASE, and ORACLE_HOME.
The binding variables before 11g Adaptive Cursor Sharing 11g have a peek, leading to some binding variables that cause execution plan problems. Study the Adaptive Cursor Sharing [SQL] SQL> select * from v $ version; BANNER Release Oracle Database 11g Enterprise Edition Release 11.2.0.3.0-Production PL/SQL Release 11.2.0.3.0-Production CORE 11.2.0.3.0 Production T
Oracle 11G 11.2.0.1.0 using exp cannot export empty tables solution 11G (11.2.0.1.0) has a bug, when the table does not have data, no segment is assigned solution: www.2cto.com 1, insert a row, then rollback generates the segment. This method inserts data into an empty table and then deletes it, resulting in a segment. An empty table can be exported. 2. set the deferred_segment_creation parameter SQL> show
BKJIA exclusive translation] Password case sensitivity is a new default feature of Oracle 11g Database, Database Configuration assistant DBCA) allows you to return this setting to functions earlier than 11g during database creation.
The SEC_CASE_SENSITIVE_LOGON initialization parameter controls whether the password is case sensitive. If the existing application conflicts with the
Detailed introduction to services and services required for Oracle 11gAfter successfully installing the Oracle 11g Database, you will find that your computer runs slowly, and your computer with low configuration may even experience very bad conditions, by disabling non-essential Oracle services, you can speed up your computer. So what should we do? After Oracle 11g R2 is successfully installed in Windows 64
Instance code for Oracle 11g User Password modification and lock/unlock function, oracle11g
1. Run cmd.exe;
2. Enter sqlplus/as sysdba to connect to the database as a system administrator (sysdba) for database management.
3. After successful connection, run
Alter user identityName identified by password; -- Change password alter user identityName account unlock; -- unlock alter user identityName account lock; -- lock identityName: user to be modified;
New Features of Oracle 11g (1)-virtual column, oracle11g
Database Version: Oracle Database 11g Enterprise Edition Release 11.2.0.2.0-64bit
The Oracle11g introduces new features of virtual columns, which are described as follows:
1> You can only create virtual columns on the heap organization table (normal table). You cannot create virtual columns on the index organization table, External table, or temporary
The following articles mainly introduce the five features of Oracle 11g and the actual and practical advantages. The application ratio of Oracle 11g performance in practice is still the majority, if you are curious about this newly developed technology, the following articles will unveil its mysteries.
Compared with data stored in a non-compressed format, the new Oracle Data Compression Technology can save
Oracle 11g introduces new features Spa (SQL performance Analyze) is now widely used in upgrades and migrations, and of course some other scenarios can be considered, such as optimizer parameter modification, IO subsystem change, etc., which can be used by the DBA Provides detailed information about the performance of SQL statements, such as statistical information before and after execution, statements that improve or degrade performance, and are used
Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.As you can see, the origin of the initial CRS (Cluster ready Services) noun is the reason for the cluster software in 10.1. Later went through the Clusterware, to the 11g, finally changed to GI.11g New Process:After installation, some background processes are generated to ensure that the cluster is wor
During the installation of 11g, this machine encountered the need to install the loop adapter. My system is Windows 2003 Server. in the network environment of the lab, IP addresses are automatically allocated by DHCP. If Oracle finds that your machine is using DHCP, install the Microsoft loopback adapter to provide a static IP address. For details about the installation method, see:
1. Click start, and then click Control Panel ".2. If you are in t
11g error ORA-27102: outofmemoryLinuxError: 22: Invalidargument
11g Error ORA-27102: out of memory Linux Error: 22: Invalid argument
It's okay to install a 11g game, and install the software dbca to create a database. Everything works normally. An error occurred when I started the service today.
[Oracle @ OEL54db11gR2 dbs] $ sqlplus/as sysdbaSQL * Plus: Rele
Oracle 11g client Configuration
First download several compressed packages from OTN
For: http://www.oracle.com/technology/software/tech/oci/instantclient/index.html
Then select different downloads based on your platform. I installed them in rhel5, so I chose Linux x86 and downloaded the following two packages:
Instantclient-basic-linux32-11.1.0.7.zip basic package that provides OCI, occi and JDBC-OCI applicationsProgram.Instantclient-sdk-linux
from the master database to the Standby DB:SQL> alter system set log_archive_dest_state_2 = defer;Re-enable log transmission after flashing back:SQL> alter system set log_archive_dest_state_2 = enable;
Oracle 11g environment:The steps are simpler. The new features of Snapshot Standby Database are added to the 11g, which is actually a package of the above 10g functions, the only difference is that archive l
" user./U01/oracle/product/11.2/db_1/root. shTo execute the configuration scripts:1. Open a terminal window2. Log in as "root"3. Run the scripts The cloning of OraDb11g_home1 was successful.Please check '/u01/oracle/oraInventory/logs/cloneActions2013-10-28_02-45-44PM.log' for more details.Run root. sh as the root user.[Root @ rac2 tmp] # sh/u01/oracle/product/11.2/db_1/root. shCheck/u01/oracle/product/11.2/db_1/install/root_rac2_2013-10-28_14-50-29.log for the output of root scriptCloning is com
New Features of 11g rman blockrecover, rmanblockrecover
Reference:New Rman Blockrecover command in 11g (Recover upload uption list) (Document ID 1390759.1)
New Features of 11g rman blockrecover:Note: The blockrecover command for 10 Gb is discarded, but it is still supported.
Rman> Recover datafile
Rman> Recover tablespace
Example:
SQL>SELECT DBMS_UTILITY.MAKE_
Navicat for Oracle connection to Oracle 11G operation process, navicat11g
Procedure for connecting Navicat for Oracle to Oracle at 11 GB
1. Change the Oracle configuration file
After installing Oracle 11g, you need to change the listener. ora and tnsnames. ora files under the C: \ Oracle Installation Base directory \ product \ 11.2.0 \ dbhome_1 \ NETWORK \ ADMIN. Remember to back up the two files first. T
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