Backend Development
PHP Tutorial
Mysql method to execute sql in the terminal and write the results to a file
Mysql method to execute sql in the terminal and write the results to a file
When using mysql to execute statements in the terminal, we generally enter mysql first, and then execute the sql statement in it.
For example:
mysql -uroot mysql> use mydb; mysql> select * from user;...
If we need to monitor certain tables and save the query results after execution, we need to manually copy them to a file, which will affect Work efficiency.
Terminal execution sql
Therefore, the following method is provided. You do not need to enter mysql, but directly use the shell to call mysql in the terminal to execute sql statements.
mysql provides -e parameters for executing statements directly on the terminal and outputting them.
For example:
mysql -uroot -e 'select * from mydb.user'
When using mysql -e to execute a statement, you can add the -v, -vv, -vvv parameters
-v Display the statement itself
-vv Increase the number of displayed query result rows
-vvv Increase the display execution time
Write the execution results to the file
Use output redirection to save the execution results to the file.
For example:
mysql -uroot -e 'select * from mydb.user' > /tmp/mydb_user.txt
After the terminal is executed, the query results will be saved in /tmp/mydb_user.txt.
When using mysql to execute statements in the terminal, we usually enter mysql first, and then execute the sql statement in it.
For example:
mysql -uroot mysql> use mydb; mysql> select * from user;...
If we need to monitor certain tables and save the query results after execution, we need to manually copy them to files, which affects work efficiency.
Terminal execution sql
Therefore, the following method is provided. You can directly use the shell to call mysql in the terminal to execute sql statements without entering mysql.
mysql provides -e parameters for executing statements directly on the terminal and outputting them.
For example:
mysql -uroot -e 'select * from mydb.user'
When using mysql -e to execute a statement, you can add the -v, -vv, -vvv parameters
-v Display the statement itself
-vv Increase the number of displayed query result rows
-vvv Increase the display execution time
Write the execution results to the file
Use output redirection to save the execution results to the file.
For example:
mysql -uroot -e 'select * from mydb.user' > /tmp/mydb_user.txt
After the terminal is executed, the query results will be saved in /tmp/mydb_user.txt.
This article explains how mysql executes sql in the terminal and writes the results to a file. For more related content, please pay attention to the php Chinese website.
Related recommendations are:
php uses token bucket algorithm to implement flow control based on redis
Redis master-slave synchronization, Related operations of read-write separation settings
Introducing the method of MySQL rebuilding table partitions and retaining data
The above is the detailed content of Mysql method to execute sql in the terminal and write the results to a file. For more information, please follow other related articles on the PHP Chinese website!
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
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
MySQL: An Introduction to the World's Most Popular Database
Apr 12, 2025 am 12:18 AM
MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.
MySQL's Place: Databases and Programming
Apr 13, 2025 am 12:18 AM
MySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen
How to connect to the database of apache
Apr 13, 2025 pm 01:03 PM
Apache connects to a database requires the following steps: Install the database driver. Configure the web.xml file to create a connection pool. Create a JDBC data source and specify the connection settings. Use the JDBC API to access the database from Java code, including getting connections, creating statements, binding parameters, executing queries or updates, and processing results.
Why Use MySQL? Benefits and Advantages
Apr 12, 2025 am 12:17 AM
MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.
How to start mysql by docker
Apr 15, 2025 pm 12:09 PM
The process of starting MySQL in Docker consists of the following steps: Pull the MySQL image to create and start the container, set the root user password, and map the port verification connection Create the database and the user grants all permissions to the database
MySQL's Role: Databases in Web Applications
Apr 17, 2025 am 12:23 AM
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.
Laravel Introduction Example
Apr 18, 2025 pm 12:45 PM
Laravel is a PHP framework for easy building of web applications. It provides a range of powerful features including: Installation: Install the Laravel CLI globally with Composer and create applications in the project directory. Routing: Define the relationship between the URL and the handler in routes/web.php. View: Create a view in resources/views to render the application's interface. Database Integration: Provides out-of-the-box integration with databases such as MySQL and uses migration to create and modify tables. Model and Controller: The model represents the database entity and the controller processes HTTP requests.
How to install mysql in centos7
Apr 14, 2025 pm 08:30 PM
The key to installing MySQL elegantly is to add the official MySQL repository. The specific steps are as follows: Download the MySQL official GPG key to prevent phishing attacks. Add MySQL repository file: rpm -Uvh https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm Update yum repository cache: yum update installation MySQL: yum install mysql-server startup MySQL service: systemctl start mysqld set up booting
