Install pyodbc: Use the pip install pyodbc command to install the library; 2. Connect SQL Server: Use the pyodbc.connect() method to use the connection string containing DRIVER, SERVER, DATABASE, UID/PWD or Trusted_Connection, which supports SQL authentication or Windows authentication respectively; 3. Check the installed driver: Run pyodbc.drivers() and filter the driver name containing 'SQL Server' to ensure that the correct driver name is used such as 'ODBC Driver 17 for SQL Server'; 4. Key parameters of the connection string include DRIVER (must match the actual installation), SERVER (with ports), DATABASE, UID/PWD (SQL authentication), or Trusted_Connection=yes (Windows authentication); 5. Frequently asked questions include driver name error causing "Data source name not found", network blockage or firewall not open port 1433, login failure requires checking the credentials and whether SQL Server enables hybrid mode authentication; it is recommended to use ODBC Driver 17 or 18 for good compatibility and TLS encryption support; as long as the driver is correct, the connection string is correct, and the network is smooth, you can successfully connect to SQL Server and perform query operations.
Connecting SQL Server Using pyodbc
is a common way in Python. Here is a simple and practical connection example that includes installation, configuration, and basic operations.

? 1. Install pyodbc
pip install pyodbc
? 2. Connect to SQL Server Example (Windows Authentication/SQL Login)
Example 1: Using SQL Server Authentication (Username and Password)
import pyodbc #Connection string server = 'your_server_name' # For example: localhost or 192.168.1.100 database = 'your_database_name' # For example: TestDB username = 'your_username' # For example: sa or other user password = 'your_password' # build the connection string conn_str = ( f'DRIVER={{ODBC Driver 17 for SQL Server}};' f'SERVER={server};' f'DATABASE={database};' f'UID={username};' f'PWD={password}' ) # Create a connection try: conn = pyodbc.connect(conn_str) print("? Connect successfully!") # Create cursor cursor = conn.cursor() # Execute a simple query cursor.execute("SELECT @@VERSION") row = cursor.fetchone() print("SQL Server Version:") print(row[0]) # Close the connection conn.close() except Exception as e: print("? Connection failed:", e)
Example 2: Using Windows Authentication (Integrated Security)
import pyodbc conn_str = ( 'DRIVER={ODBC Driver 17 for SQL Server};' 'SERVER=your_server_name;' 'DATABASE=your_database_name;' 'Trusted_Connection=yes;' # Use Windows authentication) try: conn = pyodbc.connect(conn_str) print("? Connect successfully using Windows Authentication!") cursor = conn.cursor() cursor.execute("SELECT TOP 5 * FROM your_table_name") for row in cursor.fetchall(): print(row) conn.close() except Exception as e: print("? Connection failed:", e)
? 3. Common ODBC driver names (note the case and version)
Make sure your system has the corresponding ODBC Driver installed. Common driver names:
-
{ODBC Driver 17 for SQL Server}
-
{ODBC Driver 18 for SQL Server}
-
{SQL Server Native Client 11.0}
You can view the installed drivers of the system through the following code:
import pyodbc print([x for x in pyodbc.drivers() if 'SQL Server' in x])
? 4. Connection string parameter description
parameter illustrate DRIVER
Must match the ODBC driver name installed in the system SERVER
SQL Server address, can be with port (such as localhost,1433
)DATABASE
Database name to connect to UID
/PWD
Username and Password (SQL Authentication) Trusted_Connection=yes
Using Windows Integrated Authentication
? 5. Troubleshooting of FAQs
- ? Error
Data source name not found
: Check whether the driver name is correct.- ? Unable to connect to the server: Confirm that SQL Server allows remote connections and the firewall opens port 1433.
- ? Login failed: Check the username and password, or whether SQL Server enables hybrid authentication mode.
- ? It is recommended to use ODBC Driver 17 or 18 , with good compatibility and supports TLS encryption.
Basically that's it. As long as the driver is installed, the connection string pair is connected, and the network is connected, the connection can be smoothly connected.
The above is the detailed content of python connect to sql server pyodbc example. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undress AI Tool
Undress images for free

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

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

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

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

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

Hot Topics

To realize text error correction and syntax optimization with AI, you need to follow the following steps: 1. Select a suitable AI model or API, such as Baidu, Tencent API or open source NLP library; 2. Call the API through PHP's curl or Guzzle and process the return results; 3. Display error correction information in the application and allow users to choose whether to adopt it; 4. Use php-l and PHP_CodeSniffer for syntax detection and code optimization; 5. Continuously collect feedback and update the model or rules to improve the effect. When choosing AIAPI, focus on evaluating accuracy, response speed, price and support for PHP. Code optimization should follow PSR specifications, use cache reasonably, avoid circular queries, review code regularly, and use X

User voice input is captured and sent to the PHP backend through the MediaRecorder API of the front-end JavaScript; 2. PHP saves the audio as a temporary file and calls STTAPI (such as Google or Baidu voice recognition) to convert it into text; 3. PHP sends the text to an AI service (such as OpenAIGPT) to obtain intelligent reply; 4. PHP then calls TTSAPI (such as Baidu or Google voice synthesis) to convert the reply to a voice file; 5. PHP streams the voice file back to the front-end to play, completing interaction. The entire process is dominated by PHP to ensure seamless connection between all links.

This article has selected several top Python "finished" project websites and high-level "blockbuster" learning resource portals for you. Whether you are looking for development inspiration, observing and learning master-level source code, or systematically improving your practical capabilities, these platforms are not to be missed and can help you grow into a Python master quickly.

To collect user behavior data, you need to record browsing, search, purchase and other information into the database through PHP, and clean and analyze it to explore interest preferences; 2. The selection of recommendation algorithms should be determined based on data characteristics: based on content, collaborative filtering, rules or mixed recommendations; 3. Collaborative filtering can be implemented in PHP to calculate user cosine similarity, select K nearest neighbors, weighted prediction scores and recommend high-scoring products; 4. Performance evaluation uses accuracy, recall, F1 value and CTR, conversion rate and verify the effect through A/B tests; 5. Cold start problems can be alleviated through product attributes, user registration information, popular recommendations and expert evaluations; 6. Performance optimization methods include cached recommendation results, asynchronous processing, distributed computing and SQL query optimization, thereby improving recommendation efficiency and user experience.

When choosing a suitable PHP framework, you need to consider comprehensively according to project needs: Laravel is suitable for rapid development and provides EloquentORM and Blade template engines, which are convenient for database operation and dynamic form rendering; Symfony is more flexible and suitable for complex systems; CodeIgniter is lightweight and suitable for simple applications with high performance requirements. 2. To ensure the accuracy of AI models, we need to start with high-quality data training, reasonable selection of evaluation indicators (such as accuracy, recall, F1 value), regular performance evaluation and model tuning, and ensure code quality through unit testing and integration testing, while continuously monitoring the input data to prevent data drift. 3. Many measures are required to protect user privacy: encrypt and store sensitive data (such as AES

Use Seaborn's jointplot to quickly visualize the relationship and distribution between two variables; 2. The basic scatter plot is implemented by sns.jointplot(data=tips,x="total_bill",y="tip",kind="scatter"), the center is a scatter plot, and the histogram is displayed on the upper and lower and right sides; 3. Add regression lines and density information to a kind="reg", and combine marginal_kws to set the edge plot style; 4. When the data volume is large, it is recommended to use "hex"

1. PHP mainly undertakes data collection, API communication, business rule processing, cache optimization and recommendation display in the AI content recommendation system, rather than directly performing complex model training; 2. The system collects user behavior and content data through PHP, calls back-end AI services (such as Python models) to obtain recommendation results, and uses Redis cache to improve performance; 3. Basic recommendation algorithms such as collaborative filtering or content similarity can implement lightweight logic in PHP, but large-scale computing still depends on professional AI services; 4. Optimization needs to pay attention to real-time, cold start, diversity and feedback closed loop, and challenges include high concurrency performance, model update stability, data compliance and recommendation interpretability. PHP needs to work together to build stable information, database and front-end.

The core of PHP's development of AI text summary is to call external AI service APIs (such as OpenAI, HuggingFace) as a coordinator to realize text preprocessing, API requests, response analysis and result display; 2. The limitation is that the computing performance is weak and the AI ecosystem is weak. The response strategy is to leverage APIs, service decoupling and asynchronous processing; 3. Model selection needs to weigh summary quality, cost, delay, concurrency, data privacy, and abstract models such as GPT or BART/T5 are recommended; 4. Performance optimization includes cache, asynchronous queues, batch processing and nearby area selection. Error processing needs to cover current limit retry, network timeout, key security, input verification and logging to ensure the stable and efficient operation of the system.
