最后发现却是因为sqlplus 版本的问题,我的本地DB服务器是9i,用的却是8i的sqlplus。建议:安装ORACLE的时候,会有自带的sqlplus
Tnsping服务器异常
例: tnsping intel
C:\>tnsping intel
TNS Ping Utility for 32-bit Windows: Version 9.2.0.1.0 - Production on 08-16月-2
012 15:37:27
Copyright (c) 1997 Oracle Corporation. All rights reserved.
已使用的参数档案:
d:\oracle\ora92\network\admin\sqlnet.ora
TNS-03505: 无法决定名称
A)先检查tnsnames.ora(%ORACLE_HOME%\oracle\network\admin\tnsnames.ora)配置是否正确,INTEL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST =10.161.8.100)(PORT = 1526))
)
(CONNECT_DATA =
(SERVICE_NAME = intel)
)
)
B)若正确,再ping 10.161.8.100(本地局域网)确认网路没问题
C)若网路通畅,则登入服务器(telnet 10.161.8.100)检查监听器是否开启
intel$lsnrctl status
LSNRCTL for Linux: Version 8.1.6.0.0 - Production on 08-DEC-2004 15:43:47
(d) Copyright 1998, 1999, Oracle Corporation. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC)))
TNS-01103: Protocol specific component of the address is incorrectly specified
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
显然,,此监听已被关闭.
显示监听状态:intel$lsnrctl status
开启监听命令:intel$lsnrctl start
关闭监听命令:intel$lsnrctl stop
(e) 开启监听命令:intel$lsnrctl start 监听后发现还是不行。
系统参数文件为D:\oracle\product\10.2.0\db_1\network\admin\listener.ora
写入D:\oracle\product\10.2.0\db_1\network\log\listener.log的日志信息
写入D:\oracle\product\10.2.0\db_1\network\trace\listener.trc的跟踪信息
发现也没多大问题。
(f)最后发现却是因为sqlplus 版本的问题,我的本地DB服务器是9i,用的却是8i的sqlplus。
建议:安装ORACLE的时候,会有自带的sqlplus工具,就用那个自带的,这样就不会像我一样走那么多弯路了。

InnoDBBufferPool reduces disk I/O by caching data and indexing pages, improving database performance. Its working principle includes: 1. Data reading: Read data from BufferPool; 2. Data writing: After modifying the data, write to BufferPool and refresh it to disk regularly; 3. Cache management: Use the LRU algorithm to manage cache pages; 4. Reading mechanism: Load adjacent data pages in advance. By sizing the BufferPool and using multiple instances, database performance can be optimized.

Compared with other programming languages, MySQL is mainly used to store and manage data, while other languages such as Python, Java, and C are used for logical processing and application development. MySQL is known for its high performance, scalability and cross-platform support, suitable for data management needs, while other languages have advantages in their respective fields such as data analytics, enterprise applications, and system programming.

MySQL is worth learning because it is a powerful open source database management system suitable for data storage, management and analysis. 1) MySQL is a relational database that uses SQL to operate data and is suitable for structured data management. 2) The SQL language is the key to interacting with MySQL and supports CRUD operations. 3) The working principle of MySQL includes client/server architecture, storage engine and query optimizer. 4) Basic usage includes creating databases and tables, and advanced usage involves joining tables using JOIN. 5) Common errors include syntax errors and permission issues, and debugging skills include checking syntax and using EXPLAIN commands. 6) Performance optimization involves the use of indexes, optimization of SQL statements and regular maintenance of databases.

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


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

SublimeText3 English version
Recommended: Win version, supports code prompts!

Dreamweaver Mac version
Visual web development tools

Zend Studio 13.0.1
Powerful PHP integrated development environment

SublimeText3 Mac version
God-level code editing software (SublimeText3)

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function