在linux平台上手动创建数据库(Oracle 10g),安装Oracle软件后,用手动创建数据库可以锻炼自己能力并能够了解数据库创建的全过程,步骤如下: 1、创建Oracle的SID,如果在linux上以dba组中的用户登陆查看主目录中的.bash_profile文件已经设置了此变量就可以
在linux平台上手动创建数据库(Oracle 10g),安装Oracle软件后,用手动创建数据库可以锻炼自己能力并能够了解数据库创建的全过程,步骤如下:
1、创建Oracle的SID,如果在linux上以dba组中的用户登陆查看主目录中的.bash_profile文件已经设置了此变量就可以不用设置了,如果一个服务器上运行了多个Oracle实例,则还需要设置export ORACLE_SID=myoral
也可以统一在一个文件中设置,然后执行这个文件,让所有关于Oracle的环境变量生效
创建一个目录param_myorcl.env
ORACLE_HOME=$ORACLE_HOME (如果以前创建过Oracle数据库就可以直接利用以前设置的,否则要设置到Oracle安装的目录,可以设置到bin的上层目录)
OACLE_SID=myorcl
PATH=$ORACLE_HOME/bin:$PATH
LD_LIBRARY_PATH=$ORACLE_HOME/bin:$LD_LIBRARY_PATH
TNS_ADMIN=$ORACLE_HOME/network/admin
export ORACLE_HOME ORACLE_SID PATH LD_LIBRARY_PATH TNS_ADMIN
通过执行“ . ./param_myorcl.env”可以使设置生效,但是这种方式是暂时的,否则可以直接更改.bash_profile使之永久生效
2、创建pfile,然后根据pfile创建spfile,利用spfile生成数据库实例(这是Oracle推荐的,虽然也可以利用pfile创建数据库实例)
方法一:如果服务器中已经存在一个数据库,可以通过create pfile from spfile创建pfile文件,再到$ORACLE_HOME/dbs/目录中cp initorcl.ora initmyorcl.ora,这样复制一份后再修改initmyorcl
方法二:strings spfileorcl.ora >initmyorcl.ora(注意要修改,linux上替换命令 : %s/orcl/myorcl/g)
方法三:网上找一份修改,呵呵呵
创建pfile后,检查环境变量是否生效 “env | grep ORA”
如果生效就可以启动Oracle实例了,启动后可以根据pfile创建spfile
create spfile from pfile;
3、写创建数据库脚本myorcl.sql
spool on
create database myorcl
MAXINSTANCES 1
MAXLOGHISTORY 1
MAXLOGFILES 5
MAXLOGMEMBERS 5
MAXDATAFILES 100
NATIONAL CHARACTER SET AL16UTF16
DATAFILE
'/u01/oracle/oradata/myorcl/system01.dbf' size 100m reuse autoextend on next 1m maxsize unlimited extent management
local
sysaux datafile
'/u01/oracle/oradata/myorcl/sysaux01.dbf' size 100m reuse autoextend on next 1m maxsize unlimited
default temporary tablespace TEMP tempfile
'/u01/oracle/oradata/myorcl/temp01.dbf' size 20m reuse autoextend on next 640k maxsize unlimited
undo tablespace UNDOTBS1 datafile
'/u01/oracle/oradata/myorcl/undo01.dbf' size 20m reuse autoextend on next 5M maxsize unlimited
logfile
GROUP 1 ('/u01/oracle/oradata/myorcl/redo1.dbf') size 10m,
GROUP 2 ('/u01/oracle/oradata/myorcl/redo2.dbf') size 10m,
GROUP 3 ('/u01/oracle/oradata/myorcl/redo3.d
;
spool off
4、创建数据库
@$ORACLE_HOME/dbs/myorcl.sql
5、创建数据库数据字典
spool log1.log
@?/rdbms/admin/catalog.sql
@?/rdbms/admin/catproc.sql
@?/sqlplus/admin/pupbld.sql

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.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Atom editor mac version download
The most popular open source editor

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

Dreamweaver CS6
Visual web development tools