Oracle

The connections between Oracle tables are divided into three types: 1. Inner connection (natural connection) 2. Outer connection (1) Left OUTER join (the table on the left is unrestricted) (2) Right outer join (the table on the right is

Many users want to know about Oracle RAC, but lack hardware conditions to install and understand RAC. Here we apply the Oracle VM and install it on the Xen virtual machine. The Oracle VM was officially launched on November 12, 2007, and the latest

The data guard provides the following three kinds of protection modes: 1 Maximum protection mode (Maximum Protection) "Maximum protection" here means that the maximum protection data is not lost, that is, at least one standby and primary maintain

Oracle SQL Developer is a free integrated development environment produced by Oracle Company. Oracle SQL Developer is a free, open-source, graphical tool for developing database applications, using SQL Developer to browse database objects, run SQL

The Oracle tutorial you are looking at is an overview of Oracle Portal and its portal development. Absrtact: Portal is a new technology in it field, it is one of the development direction of enterprise informatization work. This paper first

System Requirements for Oracle Enterprise Edition: CPU minimum Pentium 200M recommended PENTIUMIII 1G above Memory Minimum 128M recommended 512M Hard disk space system disk 140M installation disk 4.5G (FAT32) or 2.75G (NTFS) Standard Version: CPU

' TEST ' is a reserved word for Oracle, so be aware of it when used in some places, and I now find that Oracle treats it as a reserved word when backing up in Rman. Test is really a reserved word in rman ... To back up other tablespaces, simply

Oracle database bad blocks are repaired through the DBV and Rman Blockrecover. (1) When the Rman backup, Alert.log reported the following error: Fri 2 12:41:36 2010 Hex Dump of (file, block 2718618) in trace

--Data table space capacity usage SELECT a.tablespace_name as "table space name", To_char (b.total/1024/1024,999999.99) | | M ' as ' total capacity ', To_char ((b.total-a.free)/1024/1024, ' 9999990d99 ') | | M ' as ' used capacity ', To_char

Part I: Profile concept Oracle database 10g uses a new approach called SQL configuration files to compensate for the drawbacks of storage profiles, DBAs can use SQL Tuning Advisor (STA) or SQL Access Advisor (SAA) to identify SQL statements that

Authorization for Oracle Objects Oracle Licensing I. Authorization syntax Grant Syntax: 1. Explicit authorization (authorization of objects directly to the user) GRANT privilege [, ...]  On object [, ...] to {public| Group | Username|role}

Database concurrent access, where two or more users access the same data at the same time, is the biggest problem for the database engine to design and implement a moderate response. A well-designed, performance-capable database engine can easily

Most WEB applications today need to adopt at least some basic security policy. For example, a Web site that provides password-protected content, only Web sites with admin backend, blogs and personal magazines, E-commerce sites, intranet, and so on.

Introduction In. NET applications, there are many ways to achieve access to Oracle databases. However, from functional and performance analysis, Oracle Data Provider for. NET (odp.net) is undoubtedly our best option, a set of interfaces designed by

OS Certification Server-side OS authentication is enabled by default after Oracle installation. That is, the user and password check on the login database at the operating system level, you have the Oracle installation of the user operating system

1, the failure Point database recovery For a recovery of the point of failure (Point-of-failure), also known as full database recovery, the online redo log must be required to be complete and undamaged. If you lose the online redo log, you must do

Case 4:recover DataFile --New table space, no backup, datafile deleted Recovery steps: From the library, through the v$recover_file to see the files that need to be recovered, because there is no backup, only the data file offline, data file

Some other maintenance activities are involved when using the recovery directory, such as upgrading the recovery directory during database upgrades or migrations, manually configuring the database counterpart, and synchronizing the recovery

Oracleenterprisemanager (Oracle Enterprise Manager, abbreviation OEM) provides management services for managing distributed environments through a set of Oracle programs. OEMs include a set of DBA tools, a repository, and a graphical display of the

Case study (1) Let's say I modified a piece of data: Update people set name= ' Fusnow ' where name= ' old Fusnow '; The things I need to do include: Generate redo information in redo log buffer (including Redo,undo redo of the table, index or