Database Administrator

Oracle archiving logs Archive Log is a non-active backup of redo logs. archive logs can be used to keep all redo history records. When the database is in ARCHIVELOG mode and the log is switched, the background process ARCH will save the redo log

Build a MySQL environment on the OS X Platform References: The simplest way to install MySQL on OS X is to download the Community version DMG package from the official website. The latest version is version 5.7, the installation method has

Basic Oracle Database Operations Basic Oracle database operations. All usernames and passwords created by Oracle are bkjia Create user bkjia identified by bkjia Assign permissions to the user name Grant resource, dba, connect to bkjia; Change

Fast paging using ROW_NUMBER The method of listing by page in Linq uses Skip () and Take (). However, how do I write paging using SQL scripts? First, we can sort by ROW_NUMBER () OVER and get a view with serial numbers. Then, we can use the

Description: sqlSessionFactory injection method of MapperScannerConfigurer, sessionfactory Injection SqlSessionFactory injection for MapperScannerConfigurer First, there is a configuration in Mybatis that is very convenient, saving us time to write

  Session1:SQL> conn scott/trigerConnected.SQL> CREATE TABLE tx_eg (num number, txt varchar2 (10), sex varchar2 (10) INITRANS 1 MAXTRANS 1;INSERT into tx_eg VALUES (1, 'First ', 'female ');INSERT into tx_eg VALUES (2, 'second', 'male ');INSERT into

1. shutdown normalClose the database normally. 2. shutdown immediateClose the database immediately.Run shutdown immediate in SVRMGRL, and the database is not closed immediately,However, after Oracle executes some cleanup tasks, it closes session

1. parameter settings during Database InstallationThe following database version is ORACLE 9I (9.2.0). When the database is installed, the database system creates a database instance. The installation directory is \ oracle, enter ora9i for both the

PHP + MySQL + Linux has gradually become a classic combination of small web servers. Building and debugging MySQL Databases in Windows is a preferred choice for many website developers. I am a beginner in MySQL in Windows 98. I will summarize the

ODS is a topic-oriented, integrated, variable, and current collection of detailed data. It is used to support enterprises' demand for instant, operational, and integrated information. It is often used as a data warehouse transition and is also an

Now that DB2 9 has been released, it is time to update pureXML, one of its latest features.®To test the driver. Therefore, a simulated brokerage business environment is established. This environment has the following features: High transaction

Data Query is one of the most important functions in database operations. Sometimes the performance of database queries is directly related to the database operation efficiency and database selection. I will not talk about the principle below, but I

Editor's note: I shared with us a lot of things about his practice of SQL Server. What will I share with us this time? Please look forward... Today I found a very interesting phenomenon. The company's computer will prompt you to reset the logon

Oracle databases have three standard backup methods: Export/Import EXP/IMP), hot backup, and cold backup. Exporting spare parts is a logical backup, while cold backup and hot backup are physical backup. 1. Export/Import) The Export can be used to

-- Before the formal backup, do as follows. -- Copyright statement: -- The reader can copy or modify the content of the backup script without tampering with the author. -- Author: the roles of Xu Yujin's documents: 1. rman_db_all.sh: backs up the

Informix-4GL is a comprehensive fourth-generation application development and generation environment, it has powerful database management functions, flexible and convenient programming, user-friendly interface, has been widely used in UNIX operating

Introduction When requirements and requirements for enterprise-level high-performance databases increase, the customer sometimes needs to migrate from the Microsoft Access Jet Engine in the file transfer Server environment to the Microsoft SQL

I. Partitioning Based on actual experience, the vast majority of data space in a large database is occupied by a small number of tables. To simplify the management of large databases and improve the query performance of applications, you can use

Problem:The website cannot be accessed. After the host is restarted, the website runs normally. Solution: The database is deadlocked. Cause of deadlock: Extracting and querying the corresponding data and modifying the Stat table are all operations

SQLSERVER's table value function is a new feature of SQLSERVER 2005. It is easy to use, just like a separate table, and is widely used in our system. There is an SQL Server Table value function for obtaining customer data. If you log on as an