Database Administrator

Test environment: MySQL 5.0.45 [Note: You can use MySQL> select version (); in mysql to view the database VERSION] 1. Connect to MySQL. Format: mysql-h host address-u user name-p User Password 1. Connect to MySQL on the local machine. First open the

Today, I plan to enable the Database Control for Oracle Database 11 GB and find that the Database is not installed initially: [Oracle @ test126 ~] $ Emctl startEM Configuration issue./opt/Oracle/product/11.1.0/test126.hurray.com.cn _ dodd not

Take SUSE 10 SP2 and Oracle 10g R2 as an example. Official Website: Http://www.oracle.com/technology/global/cn/software/products/database/oracle10g/htdocs/10201linuxsoft.html In addition to the standard database software installation package

To enable Oracle 11g release 1 to support full DL reasoning, install oracle Jena Adaptor patch for Oracle 11g. Official installation: http://www.oracle.com/technology/tech/semantic_technologies/documentation/jenadrv_patch_ig.txtPatch:

Server Configuration:Xeon 3.0 GHZ * 24 gb ecc ddr memory300 gb scsi Utrl 320 15 K hard drive X 2 Prerequisites:Memory and swap space; For details, see the official database \ doc \ install directory documentationAvailable RAM Swap Space

I. Summarize some MySQL commands in Linux: 1. commands for starting mysql in Linux:Mysqladmin start/Ect/init. d/mysql start (the installation path of mysql is earlier) 2. Command for restarting mysql in Linux:Mysqladmin restart/Ect/init. d/mysql

For example, when creating a news navigation bar, it is often like this: Home> A> A1> A2 In this way, we need to display the names of the fathers of A2, for example, in the classification of A2. in Oracle, it is very easy to do, mainly using Start

You can choose from two solutions: 1. Use the database upgrade assistant (dbua) upgrade utility provided by oracle to directly upgrade 9i database to 10 Gb. 2. Create a 10 Gb database and use the import/export (imp/exp) utility of oracle to migrate

When using MySQL, we often encounter table names that do not comply with the specifications or standards, but there is already a large amount of data in the table. How can we keep the data and only change the table name? You can create a table with

The relevant Oracle Database Sequence information is as follows: Create Sequence syntax Create sequence . _ sIncrement by 1Start with 1Max value 99999999999999999999Minvalue 1Nocycle; Where:Incerment: value added each timeStart: Sequence start

CentOS mysql has been widely used but is constantly updated. Here we will introduce how to install and use CentOS mysql to help you install and update CentOS mysql. Install CentOS mysql; 1] Extract[Root @ localhost root] #

-- According to friends, the performance improvement is obvious after DNS is turned off.-- The mysql. cnf file is in/ect/init. d/mysql. cnf.Recently, I found that two MySQL servers suddenly went viral at noon (suddenly) and kept failing. Restarting

I. background of testing requirements1. Have you asked me if the initialization parameter can take effect immediately after modification? I did a test immediately and concluded that yes. 2. in linux, Oracle data blocks are 8 KB by default and

MySQL numeric data types can be roughly divided into two categories: one is an integer, and the other is a floating point or decimal. Many different subtypes are available for each of these classes. Each subtype supports data of different sizes.

I. Software Used1. Fedora linux SystemHttp://torrent.fedoraproject.org/There are a lot of installation methods on the Internet, so I won't talk about them here, but some may not be able to use them. These are all self-organized,2.

Record:Upgrade Oracle11g to version 11.2.0.3 and execute @? In the process of/rdbms/admin/catupgrd. SQL, the following error message is displayed:ORA-00604: error occurred at recursive SQL level 1ORA-01704: string literal too longORA-00932:

Oracle provides three standard roles (role) for compatibility with earlier versions: connect, resource, and dba. 1. connect role (connection role) Temporary users, especially those who do not need to create tables, usually only connect them. Connect

Linux, the machine is Oracle 11g Database, import database for 10g, through expdp, impdp Data Pump import, at the beginning of the prompt ora-39001, found that the file directory is not found or the file name is not the same. According to the prompt,

Start Oracle of the VM and execute startup. the following error code is displayed, SQL> startup ORA-00119: invalid specification for system parameter LOCAL_LISTENERORA-00130: invalid listener address '(ADDRESS = (PROTOCOL = TCP) (HOST = orapy) (PORT

The binlog parsing tool is widely used. mysqlbinlog is the most commonly used tool.However, there are rivers and lakes where tools are available. Therefore, this article does not intend to argue that tools are superior or inferior to avoid immature