Programs->Microsoft SQL Server 2008->SQL Server 2008 Peripheral Application Configurator"; then click "Service" and select Start. Can."/> Programs->Microsoft SQL Server 2008->SQL Server 2008 Peripheral Application Configurator"; then click "Service" and select Start. Can.">
search
HomeDatabaseSQLWhat to do if sql fails to connect to the server

What to do if sql fails to connect to the server

What should I do if SQL fails to connect to the server?

Due to the following reasons:

1. The database engine has not started.

There are two starting methods:

(1)Start- >Programs->Microsoft SQL Server 2008->SQL Server 2008 Surface Application Configurator, click "Service Connection Surface Application Configurator" in the interface that opens, find Database Engine in the interface that opens, and click " "Service", check on the right to see if it has been started. If not, click "Start" and make sure the "Startup Type" is automatic, not manual, otherwise it will have to be started manually the next time you turn on the computer;

(2) Can be opened: Start->Programs->Microsoft SQL Server 2008->Configuration Tools->SQL Server Configuration Manager, select SQL Server (MSSQLSERVER) in the SQL Server 2008 service, and click in the toolbar The "Start Service" button changes the service status to Start;

When using the above two methods, sometimes an error may occur during startup[/b] and cannot be started. In this case, check "SQL SQL Server 2008 Network Configuration in Server 2008 Configuration Manager -> Is VIA in the MSSQLSERVER protocol enabled? If so, disable it. Then perform one of the above operations.

Recommendation: "sql tutorial"

2. When making a remote connection, whether the remote connection has been allowed.

SQL Server 2008 by default Local connection only. We can manually enable remote connection. In the first method above, find the Database Engine, click "Remote Connection", and change "Local connection only (L)" to "Local connection and Remote Connection (R)", and select "Use TCP/IP and named pipes (B) at the same time".

3. If it is a remote connection, check whether the statement to connect to the database is correct and whether the login account is correct. Correct, is the password correct, etc.

When I connected to the database in a local area network, there was a problem with the connection string. When one machine in the local area network connected to another machine in the database, the Data Source =The IP of another machine with the database installed. I always get the above error when connecting to the database. After checking for a long time, I later found that the IP was not correctly passed to the connection string. It turned out that when I connected, I used It is local, that is, 127.0.0.1, and the entered IP is not passed to the connection string.

For more programming related content, please pay attention to the Programming Introduction column on the php Chinese website!

The above is the detailed content of What to do if sql fails to connect to the server. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
SQL: The Language, MySQL: The Database Management SystemSQL: The Language, MySQL: The Database Management SystemApr 21, 2025 am 12:05 AM

The relationship between SQL and MySQL is: SQL is a language used to manage and operate databases, while MySQL is a database management system that supports SQL. 1.SQL allows CRUD operations and advanced queries of data. 2.MySQL provides indexing, transactions and locking mechanisms to improve performance and security. 3. Optimizing MySQL performance requires attention to query optimization, database design and monitoring and maintenance.

What SQL Does: Managing and Manipulating DataWhat SQL Does: Managing and Manipulating DataApr 20, 2025 am 12:02 AM

SQL is used for database management and data operations, and its core functions include CRUD operations, complex queries and optimization strategies. 1) CRUD operation: Use INSERTINTO to create data, SELECT reads data, UPDATE updates data, and DELETE deletes data. 2) Complex query: Process complex data through GROUPBY and HAVING clauses. 3) Optimization strategy: Use indexes, avoid full table scanning, optimize JOIN operations and paging queries to improve performance.

SQL: A Beginner-Friendly Approach to Data Management?SQL: A Beginner-Friendly Approach to Data Management?Apr 19, 2025 am 12:12 AM

SQL is suitable for beginners because it is simple in syntax, powerful in function, and widely used in database systems. 1.SQL is used to manage relational databases and organize data through tables. 2. Basic operations include creating, inserting, querying, updating and deleting data. 3. Advanced usage such as JOIN, subquery and window functions enhance data analysis capabilities. 4. Common errors include syntax, logic and performance issues, which can be solved through inspection and optimization. 5. Performance optimization suggestions include using indexes, avoiding SELECT*, using EXPLAIN to analyze queries, normalizing databases, and improving code readability.

SQL in Action: Real-World Examples and Use CasesSQL in Action: Real-World Examples and Use CasesApr 18, 2025 am 12:13 AM

In practical applications, SQL is mainly used for data query and analysis, data integration and reporting, data cleaning and preprocessing, advanced usage and optimization, as well as handling complex queries and avoiding common errors. 1) Data query and analysis can be used to find the most sales product; 2) Data integration and reporting generate customer purchase reports through JOIN operations; 3) Data cleaning and preprocessing can delete abnormal age records; 4) Advanced usage and optimization include using window functions and creating indexes; 5) CTE and JOIN can be used to handle complex queries to avoid common errors such as SQL injection.

SQL and MySQL: Understanding the Core DifferencesSQL and MySQL: Understanding the Core DifferencesApr 17, 2025 am 12:03 AM

SQL is a standard language for managing relational databases, while MySQL is a specific database management system. SQL provides a unified syntax and is suitable for a variety of databases; MySQL is lightweight and open source, with stable performance but has bottlenecks in big data processing.

SQL: The Learning Curve for BeginnersSQL: The Learning Curve for BeginnersApr 16, 2025 am 12:11 AM

The SQL learning curve is steep, but it can be mastered through practice and understanding the core concepts. 1. Basic operations include SELECT, INSERT, UPDATE, DELETE. 2. Query execution is divided into three steps: analysis, optimization and execution. 3. Basic usage is such as querying employee information, and advanced usage is such as using JOIN connection table. 4. Common errors include not using alias and SQL injection, and parameterized query is required to prevent it. 5. Performance optimization is achieved by selecting necessary columns and maintaining code readability.

SQL: The Commands, MySQL: The EngineSQL: The Commands, MySQL: The EngineApr 15, 2025 am 12:04 AM

SQL commands are divided into five categories in MySQL: DQL, DDL, DML, DCL and TCL, and are used to define, operate and control database data. MySQL processes SQL commands through lexical analysis, syntax analysis, optimization and execution, and uses index and query optimizers to improve performance. Examples of usage include SELECT for data queries and JOIN for multi-table operations. Common errors include syntax, logic, and performance issues, and optimization strategies include using indexes, optimizing queries, and choosing the right storage engine.

SQL for Data Analysis: Advanced Techniques for Business IntelligenceSQL for Data Analysis: Advanced Techniques for Business IntelligenceApr 14, 2025 am 12:02 AM

Advanced query skills in SQL include subqueries, window functions, CTEs and complex JOINs, which can handle complex data analysis requirements. 1) Subquery is used to find the employees with the highest salary in each department. 2) Window functions and CTE are used to analyze employee salary growth trends. 3) Performance optimization strategies include index optimization, query rewriting and using partition tables.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment