Oracle is a popular relational database management system that is widely used in enterprise-level applications. However, you may encounter various errors during Oracle installation and use, such as 12154 error.
Error 12154 usually indicates a problem with the Oracle client connecting to the database. Specifically, this error is usually caused by the following issues:
- The database name is misspelled.
- The database server name/address is spelled incorrectly.
- The database server port number is incorrect.
- The database instance name is spelled incorrectly.
If you encounter the 12154 error, here are some possible solutions:
- Check that the database name is spelled correctly. Oracle database names are case-sensitive, so make sure you spell the database name correctly.
- Check whether the database server name/address is correct. Make sure you are using the correct hostname or IP address and that the server is accessible from your computer.
- Check whether the database server port number is correct. Oracle Database uses the default port 1521, but if your database administrator has changed this port number, you need to use the correct port number.
- Check whether the database instance name is correct. Make sure you spell the instance name correctly and use correct syntax. The Oracle instance name usually consists of the database name and the instance name, for example: database_name/instance_name.
- Check whether the tnsnames.ora file is correct. The tnsnames.ora file contains connection details about the database. If there are any errors or missing information, it may result in 12154 error. Make sure the tnsnames.ora file contains the correct database name, host name, port number, and instance name.
- Make sure the Oracle client is correctly installed and configured. If you get the 12154 error, it may be because the Oracle client is not installed correctly or is not configured correctly.
In summary, Oracle error 12154 can be caused by a variety of factors, but most problems are related to the details of the database connection. You should be able to resolve most issues by checking connection details such as database name, server address, port number, instance name, and tnsnames.ora file. If the problem persists, check that your Oracle client is installed and configured correctly and contact your database administrator for assistance.
The above is the detailed content of What to do if 12154 error occurs in oracle. For more information, please follow other related articles on the PHP Chinese website!
Oracle Software in Action: Real-World ExamplesApr 22, 2025 am 12:12 AMOracle software applications in the real world include e-commerce platforms and manufacturing. 1) On e-commerce platforms, OracleDatabase is used to store and query user information. 2) In manufacturing, OracleE-BusinessSuite is used to optimize inventory and production planning.
Oracle Software: Applications and IndustriesApr 21, 2025 am 12:01 AMThe reason why Oracle software shines in multiple fields is its powerful application and customized solutions. 1) Oracle provides comprehensive solutions from database management to ERP, CRM, SCM, 2) its solutions can be customized according to industry characteristics such as finance, medical care, manufacturing, etc. 3) Successful cases include Citibank, Mayo Clinic and Toyota, 4) The advantages lie in comprehensiveness, customization and scalability, but challenges include complexity, cost and integration issues.
Choosing Between MySQL and Oracle: A Decision GuideApr 20, 2025 am 12:02 AMChoosing MySQL or Oracle depends on project requirements: 1. MySQL is suitable for small and medium-sized applications and Internet projects because of its open source, free and ease of use; 2. Oracle is suitable for core business systems of large enterprises because of its powerful, stable and advanced functions, but at a high cost.
Oracle's Products: A Deep DiveApr 19, 2025 am 12:14 AMOracle's product ecosystem includes databases, middleware and cloud services. 1. OracleDatabase is its core product, supporting efficient data storage and management. 2. Middleware such as OracleWebLogicServer connects to different systems. 3. OracleCloud provides a complete set of cloud computing solutions.
MySQL and Oracle: Key Differences in Features and FunctionalityApr 18, 2025 am 12:15 AMMySQL and Oracle each have advantages in performance, scalability, and security. 1) Performance: MySQL is suitable for read operations and high concurrency, and Oracle is good at complex queries and big data processing. 2) Scalability: MySQL extends through master-slave replication and sharding, and Oracle uses RAC to provide high availability and load balancing. 3) Security: MySQL provides fine-grained permission control, while Oracle has more comprehensive security functions and automation tools.
Oracle: The Powerhouse of Database ManagementApr 17, 2025 am 12:14 AMOracle is called the "Powerhouse" of database management because of its high performance, reliability and security. 1. Oracle is a relational database management system that supports multiple operating systems. 2. It provides a powerful data management platform with scalability, security and high availability. 3. Oracle's working principles include data storage, query processing and transaction management, and supports performance optimization technologies such as indexing, partitioning and caching. 4. Examples of usage include creating tables, inserting data, and writing stored procedures. 5. Performance optimization strategies include index optimization, partition table, cache management and query optimization.
What Does Oracle Offer? Products and Services ExplainedApr 16, 2025 am 12:03 AMOracleoffersacomprehensivesuiteofproductsandservicesincludingdatabasemanagement,cloudcomputing,enterprisesoftware,andhardwaresolutions.1)OracleDatabasesupportsvariousdatamodelswithefficientmanagementfeatures.2)OracleCloudInfrastructure(OCI)providesro
Oracle Software: From Databases to the CloudApr 15, 2025 am 12:09 AMThe development history of Oracle software from database to cloud computing includes: 1. Originated in 1977, it initially focused on relational database management system (RDBMS), and quickly became the first choice for enterprise-level applications; 2. Expand to middleware, development tools and ERP systems to form a complete set of enterprise solutions; 3. Oracle database supports SQL, providing high performance and scalability, suitable for small to large enterprise systems; 4. The rise of cloud computing services further expands Oracle's product line to meet all aspects of enterprise IT needs.
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
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.
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
