Database Administrator

Clone an existing Oracle Home without the trouble of installing the new oracle10g software. If the original Oracle Home has installed a patch, you can skip patch. 1. Prepare for installation on the target host 172.19.111.371. Add a group and a user (

1. Obtain the TRACE method from the SESSION.SQL code// Get startedAlter session set TIMED_STATISTICS = TRUE;Alter session set SQL _TRACE = TRUE;// SQL Execution............................................................// End of AcquisitionAlter

Oracle 11g R2 64-bit start em with the following error:[Root @ localhost ~] # Su-oracle[Oracle @ localhost ~] $ Emctl start dbconsoleEnvironment variable ORACLE_UNQNAME not defined. Please set ORACLE_UNQNAME to database unique name.[Oracle @

With the release of MySQL 5.5, Oracle began to promote the Web application function of this open source database, while its Oracle database is mainly for enterprise-level applications. Monica Kumar, Senior Manager of Oracle product marketing

I. Physical Structure: 1. Data Files: the Oracle database contains several data files, which store database data, including tables and indexes. Several features of data files: 1) only one data file can be allocated to one database. 2) data files can

1. Fedora 13: create users, groups, and directories required for Oracle Installation (1) Add groups and users: Groupadd oinstall Groupadd dba Groupadd rule Useradd-g oinstall-G dba oracle Passwd oracle (2) create an Oracle installation directory and

Oracle 10g environment variables for NLS have changed a bit: For RDBMS 7.2.x version the variable is called ORA_NLS.For version 7.3.x the variable is called ORA_NLS32. For Oracle 8, 8i and 9 variable is called ORA_NLS33. For Oracle 10g the

I. Overview In Oracle block programming (begin series), because it does not support the form of select... from... returned result set, results can only be returned in the form of output parameters. As a structure that encapsulates the result set

In DataGuard, the data protection mode should be set as needed In all configurations, performance is used for data security, or the data security level is used for performance. 1. Data protection modeFirst: Maximize Data ProtectionMaximum

During routine DB2 maintenance, transaction log full is a common problem, and the usage of log space is also a matter of great importance. How can we view the log space usage?In fact, we mentioned archive settings yesterday. We know that DB2 has

Oracle ASM (Automatic Storage Management System) is a database file storage management system officially provided by oracle. Compared with other file storage systems, AMS has specific advantages in load balancing, performance optimization, and

An import failure occurs when data is imported or exported locally. Oracle Reports that ora 12154 cannot parse the specified connection identifier. The Import Name is as follows: Imp crspuser/123456 @ crsp fromuser = crspfenlove touser = crspuser

In the past, most of the company's projects were on version 5.5, and there was just a project (free trading platform) with a small amount of data. A single server ran stably online and rarely took over, in order to unify the version, I plan to

In Oracle, if a column type is varchar2, it cannot be directly converted to the clob type. It can be modified indirectly. The following is an experiment: SQL> create table test (id int, name varchar2 (10 )); Tablecreated SQL> insert into test values

Recently I just changed my job, but fortunately, I am still working on Database O & M. What is depressing is that the upgrade is shared. The background error is reported! First let's talk about ora-00020 error! We all know the reason is that the

This experiment simulates the restoration of log files in non-archive mode with no backup conditions.All the redo logs here are deleted. The following error and database mode are reported:SQL> startupORACLE instance started.Total System Global Area 8

Compile the Oracle driver in Windows Open the project:C: \ Qt \ 4.8.1 \ src \ plugins \ sqldrivers \ oci Modify oci. pro: TARGET = qsqloci SOURCES = main. cppInclude (.../../SQL/drivers/oci/qsql_oci.pri) Include (../qsqldriverbase. pri) INCLUDEPATH +

This section describes some precautions for online Oracle table space transfer. Examples are provided.Principle Analysis Use copy data file + import metadata to migrate data Table space can be transferred across platforms COLUMNPLATFORM_NAME FORMAT

Abstract: describes in detail the definition and use of cursors in Oracle databases. You can use instance operations to gain an in-depth understanding of the usage and usage of cursor.I. Related Concepts 1. concept When Oracle Database executes aSQL

In RHEL5, the automatic backup script of RMAN is written and regularly executed on the server: Requirements (1) Full backup of the database, backup of control files and archive log files at the same time, and automatic deletion of archived logs