Database Administrator

The oracle11g database and PLSQL connector database client are installed in the Windows XP system. When I connect to the oracle9 database on the remote server, a series of problems such as "cocould not load E: \ app \ Administrator \ product \ 11.2.

1. decompress the package to the custom directory. Mine is E: \ MySQL. 2. environment variable configuration MYSQL_HOME E: \ MySQL (your extract directory) % MYSQL_HOME % \ bin is added to path; 3. Find C: \ Windows \ System32 \ cmd.exe, right-click

698. In your production database, you: -Are using Recovery Manager (RMAN) with a recovery catalog to perform the backup operation at regular intervals -Set the control file autobackup to "on" -Are maintaining image copi es of the database files

Preface: In May February 23, in the bright future conference room of danling street SOHO building, Huangzhuang, Haidian District, Zhongguancun, hadoop expert Wu Chao Xia sorted out the concepts of hadoop beginners and briefly introduced the log

The Master/Slave configuration of the mysql server, which can implement read/write splitting, or restore data from the slave database after the master database fails.Two machines are required, mysql is installed, and the two machines must be in the

Problem 1: the command line starts mysql and the "System Error 5, Access Denied" error occurs.Problem description: Sometimes mysql is started using the command line"System Error 5: Access Denied".Problem analysis: the reason is the current user'sThe

Continue with the above blog: There are instructions on the data mining method model steps5. Repair problem Data All data is dirty. All data is faulty.Is it true that the problem may sometimes change with the change of data mining technology. Some

Abstract: The database is the foundation of the system. If you need to change the fields of the database frequently, or even modify the table and table relationship, I believe that no one will be able to cope with it several times! Because of the

Maybe many people may encounter such problems when using the mysql database like me. They cannot display Chinese characters and cannot be loaded into the database. This is the character encoding problem that programmers will encounter. Next we

Sqlplus can recover a part of the data file when archiving is complete. However, RMAN is specialized in restoring the backup.The following describes how to restore damaged data files.1. The data file in the tablespace is damaged, but the storage

Because only mysql is used for data storage, it takes a long time to complete complex data statistics. Therefore, you need to import part of the data to redis and save the result to mysql after completing data statistics. After checking the data,

This article is based on Mysql storage program usage Storage Functions The storage function returns the result to the caller. Create an instance using a storage functionMysql> delimiter $ // set $ as the separator mysql> create function

JDBC operation steps:  1,Load driver  2,Connect to database  3,Database Operations  4,Close the database and release the connection That is to say, all users need to go through these four steps, but the three steps in these four steps are the same

When we use ArcSDE to store vector and raster data, it is necessary to store the relevant tables and indexes separately. That is to say, when a user accesses a table, he will first access the index of the table and then quickly locate the content of

Getting started with ArangoDB Author: chszs, reprinted with note. Blog homepage: http://blog.csdn.net/chszsI. ArangoDB introduction ArangoDB is an open source NoSQL database, Official Website: https://www.ArangoDB.org/ ArangoDB supports flexible

In general, the SQL statement optimization policy has the following aspects: ● When creating a table. Try to create a primary key to query data based on the primary key. ● delete a big data table and replace delete with truncate table. ● Use

Development Environment: jvm 1.7.0 _ 17 eclipse (Juno) + maven plug-in (m2e-Maven Integration for Eclipse 1.4.0.20130601-0317) maven 3.0.4mysql 5.0.22-win321. project directory structure 2 dependent packages (pom. xml file) 4.0.0 MybatisLearning

When a student registers for the data center charging system. The registration function requires writing records to the Student table, Card table, and ChargeRecord table. At that time, there was a confusion when dealing with this problem. What

Abstract:/* Create tablespace systemvDatafile '/opt/oracle/oradata/ibm/systemv01.dbf' size 10 mAutoextend on ;*//* Drop tablespace systemvIncluding contents and datafiles ;*/Create user "SYSTEMV"Identified by "123456" default tablespace

Write MongoDB today. This product is a document-orientied, basically using json for interaction. He called the json-like object BJSON, which contains some data types defined by mongoDB. This data format is easy to transmit and store. First, we will