一、LINUX系统的安装一、RedHat AS4系统安装:磁盘分区注意:SWAP空间要是内存大小的二倍.网络基本配置根据本地网络情况配置.主机
一、LINUX系统的安装
一、RedHat AS4系统安装:
磁盘分区注意:SWAP空间要是内存大小的二倍.
网络基本配置根据本地网络情况配置.
主机名:linuxsvr
防火墙基本配置:
⊙ 无防火墙
⊙ 是否启用 SELinux:已禁用
安装方式的选项:
⊙ 定制要安装的软件包(C)
桌面选项:
(√) X窗口系统 (选取默认)
(√) GNOME桌面环境 (选取默认)
(√) KDE桌面环境 (选取默认)
应用程序选项:
( ) 工程和科学 (选取默认)
( ) 图形化互联网 (选取默认)
(√) 基于文本的互联网 (选取默认)
( ) 办公/生产率 (选取默认)
服务器选项:
(√) 服务器配置工具 (选取全部)
( ) 万维网服务器 (选取全部)
(√) Windows文件服务器 (选取全部)
( ) DNS服务器 (选取全部)
开发选项:
(√) 开发工具 (选择全部)
系统选项:
(√) 管理工具 (选取默认)
(√) 打印支持 (选取默认)
杂项选项:
全部不要选择;
安装完后,请在第三张安装盘中找到下面的文件,双击安装上去。否则安装Oracle时会报错。
libaio-devel-0.3.103-3.i386.rpm
readline-devel-4.3-13
请一要安装好以上所列出的软件包,否则安装Oracle系统时,会出现一些不必须要的错误信息!
二、Oracle的安装前准备:
1、配置系统内核参数,以root用户登录,修改在/etc/sysctl.conf文件,在该文件中添加以下参数:
kernel.shmall = 2097152
kernel.shmmax = 2147483648
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default = 262144
net.core.rmem_max = 262144
net.core.wmem_default = 262144
net.core.wmem_max = 262144
2、创建安装数据库时所需要使用的用户组oinstall,dba及Oracle用户,并将oinstamll,dba组定义成oracle用户的主次组。命令参考如下:
# groupadd oinstall
# groupadd dba
# useradd -g oinstall -G dba oracle (设定oracle用户为oinstall、dba用户组的成员)
# passwd oracle (设定oracle用户的密码)
3、以root用户身份登录系统创建Oracle系统的安装目录和数据库文件存放的目录。例如:/oracle,及改变以上目录的属性命令参考如下:
# mkdir -p /oracle/product/ 10.2.0 (创建数据目录)
# chown -R oracle.oinstall /oracle (设定目录所属的用户组和用户)
# chmod -R 775 /oracle (设定目录的读写权限)
4、以oracle 用户身份登录系统,复制oracle安装文件到/home/oracle下:
# cp 原文件夹 /home/oracle/ (复制文件到oracle个人目录内;也可以在图形界面下复制)
# unzip /home/oracle/10201_database_linux32.zip (解压zip文件)
5、配置oracle用户环境,,以oracle用户登录,修改oracle用户下的 .bash_profile 文件。增加以下参数:
vi .bash_profile (执行vi命令来修改.bash_profile)
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
PATH=$PATH:$HOME/bin
export PATH
unset USERNAME
# 以下是我们所需配置的内容
umask 022
TMP=/tmp; export TMP
TMPDIR=$TMP; export TMPDIR
ORACLE_BASE=/oracle; export ORACLE_BASE
ORACLE_HOME=$ORACLE_BASE/product/ 10.2.0/; export ORACLE_HOME
ORACLE_SID=fstest; export ORACLE_SID
ORACLE_TERM=xterm; export ORACLE_TERM
PATH=/usr/sbin:$PATH; export PATH
PATH=$ORACLE_HOME/bin:$PATH; export PATH
LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib; export LD_LIBRARY_PATH
CLASSPATH=$ORACLE_HOME/JRE:$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib; export CLASSPATH
#LD_ASSUME_KERNEL=2.4.1; export LD_ASSUME_KERNEL
6、重新启动操作系统:
# reboot (重新启动命令)
特别说明:因为安装Oracle软件时不可使用root(超级用户)来进行安装,只可以使用刚才新建的oracle用户来进行安装,请大家一定要注意!

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.


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