Database Administrator

In a layer-3 Application model, the middle layer (such as WebSphere Application Server or Domino) is responsible for user authentication for running client applications and managing interaction with database servers. The authorization ID of the

The main responsibility of daily management is to manage the running status of MySQL server program mysqld, so that database users can smoothly access the MySQL server. The following are the main responsibilities of this job:Server startup and

1. Download the MySQL Installation FileThe following two files are required to install MySQL:MySQL-server-4.0.23-0.i386.rpmMySQL-client-4.0.23-0.i386.rpmOpen this webpage at http://www.mysql.com/downloads/mysql-4.0.html, pull down the webpage to the

When tomcat is started, the system prompts that port 8080 is in use. After searching, it finds that the Oracle, tomcat, jboss, and other servers occupying port 8080 are installed on one machine, port 8080 is occupied.I. first check the usage of port

I. SummaryThe preceding section briefly introduces ProC configuration and Development in Windows. This time, we use the Linux platform to configure the Oracle ProC Development Environment (RedHat Linux 9 + Oracle 92) again ). ORACLE Database

How many times have you been embarrassed to consider how to set up a database? In fact, if you use MySQL on Linux, this will not happen. Using the Webmin GUI on Linux to create a MySQL database is quite simple.In this article, we will take a look at

Substr () function: returns part of the string.Syntax: substr (string, start, length)Required: specifies where the string starts.Positive number-start at the specified position of the stringNegative number-starting from the specified position at the

The customer's two IBM Power 740 minicomputers use the HACMP software to create database servers with mutual standby relationships. Each minicomputer runs a database, and any server fails, another minicomputer should take over the database

Environment: Oracle 11g R2 + SQLPlus Problem: Oracle SQL Import Solution: Win + Run -------> Cmd -------> enter the following command: -- Syntax: sqlplus user name/password @ SQL File  Sqlplus system/manager @ H: \ Oracle \ product \ 11.2.0

EnvironmentOn servers 192.168.1.89 and 90, the operating system is linux Red Hat as 5.2, Oracle 10.2.0.4 is installed, and a single instance database webdb is created respectively.Configure the Data Guard environment with the webdb Of the 89

In applications with large data volumes, you often need to optimize database configurations and SQL statements to ensure the concurrency of applications when loading large data volumes. MySQL has a built-in analyzer Profiler. With Profiler,

In the RedHat Linux environment, set to manually start the Oracle 10 Gb Database 1. Modify the file/oracle/product/10.2.0/db_1/bin/dbstart. # Vi/oracle/product/10.2.0/db_1/bin/dbstart Modify the following content: ORACLE_HOME_LISTNER

The sys password of the Oracle 10g ASM instance sometimes needs to be modified. The modification method is to directly modify the password file of the ASM instance, which is different from that of the user in the database instance. We cannot use the

In a single instance, to modify a data block, the process must modify it on the Current copy of the data block. The same is true for RAC environments. This involves a series of problems: How to obtain the distribution chart of data block versions

In Oracle, there are two optional parsing processes for a submitted SQL statement: Hard parsing and soft parsing. A hard parsing requires parsing, creating execution paths, optimizing access plans, and many other steps. hard explanation not only

Postgres Plus Advanced Server has two migration tools, one graphical interface and one command line interface. The following uses a graphical interface as an example. Read more: Install ipvs Plus Advanced Server 9.2 on 64-bit RHEL6.2 1 First, you

I encountered a lot of trouble when I recently used Oracle to import and export data! Then I carefully studied the oracle database and summarized several command methods for import and export for future reference. Data export: 1. Export the database

-- ====================================== -- Create an ASM instance and an ASM Database -- ====================================== 1. concepts related to ASM 1. What is ASM (Auto Storage Management) Automatic Storage Management is a tool used to

For production purposes, install the DB2 database on an IBM X3850 server. The following describes the procedure. Software and Hardware System Configuration: Operating System: SUSE enterprise 10 linux (64bit) Hardware configuration: 32 GB

Oracledata database objects are ineffective, through plsqldev.exe program for package compilation; Reported ORA-03114: database connection failure error. Oracle DB version: 9.2.0.1 Cause of failure: the PLSQLDev.exe program conflicts with the CDC