Starting the rollback function on Windows 11 must be performed within 10 days after the upgrade. The steps are as follows: 1. Open "Settings", 2. Enter "System", 3. Find the "Recover" option, 4. Start rollback, 5. Confirm the rollback. After rollback, you need to pay attention to data backup, software compatibility and driver updates.

C drive can expand capacity in five ways: 1. Use Windows disk management tools to expand the volume, but there must be unallocated space; 2. Use third-party software such as EaseUS or AOMEI to adjust the partition size; 3. Use Diskpart command line tools to expand the C drive, suitable for users who are familiar with the command line; 4. Repartition and format the hard disk, but it will cause data loss and data needs to be backed up; 5. Use external storage devices as C drive expansion, transfer folders through symbolic links or modification of the registry.

Create a SQLite database in Python using the sqlite3 module. The steps are as follows: 1. Connect to the database, 2. Create a cursor object, 3. Create a table, 4. Submit a transaction, 5. Close the connection. This is not only simple and easy to do, but also includes optimizations and considerations such as using indexes and batch operations to improve performance.

Java middleware is a software that connects operating systems and application software, providing general services to help developers focus on business logic. Typical applications include: 1. Web server (such as Tomcat and Jetty), which handles HTTP requests; 2. Message queue (such as Kafka and RabbitMQ), which handles asynchronous communication; 3. Transaction management (such as SpringTransaction), which ensures data consistency; 4. ORM framework (such as Hibernate and MyBatis), which simplifies database operations.

Navicat improves database workflow through core functions such as data modeling, SQL development, data transmission and synchronization. 1) Data modeling tools allow the design of database structures by dragging and dropping. 2) SQL development tools provide syntax highlighting and automatic completion to improve the SQL writing experience. 3) The data transmission function automatically handles data type conversion and consistency checks to ensure smooth data migration. 4) The data synchronization function ensures data consistency in development and production environments.

Recently, the first list of Hongmeng system upgrades has been announced, and p40 and p40Pro are also among them. However, many users reported that they could not upgrade smoothly. Next, let’s discuss how to upgrade p40 and p40Pro to the Hongmeng system. How to upgrade p40 and p40Pro to the Hongmeng system and install the APP First, make sure that the "My Huawei" and "Pollen Club" APP have been updated to the latest version. You can search and download these two apps in the app market. If it has been uninstalled before, it needs to be reinstalled. Before upgrading the public beta version, it is recommended to back up all important data on your phone or tablet and confirm that the backup is complete and valid to prevent data loss after the upgrade or other unexpected situations. Open the activity portal to take "My Huawei" APP as an example

Lock waiting issues can be solved by optimizing SQL statements, using appropriate transaction isolation levels, and monitoring database performance. 1. Optimize SQL statements to reduce lock holding time, such as improving query efficiency through indexing and partitioning. 2. Choose the appropriate transaction isolation level to avoid unnecessary lock waiting. 3. Monitor database performance and promptly discover and deal with lock waiting problems.

An efficient way to batch stop a Docker container includes using basic commands and tools. 1. Use the dockerstop$(dockerps-q) command and adjust the timeout time, such as dockerstop-t30$(dockerps-q). 2. Use dockerps filtering options, such as dockerstop$(dockerps-q--filter"label=app=web"). 3. Use the DockerCompose command docker-composedown. 4. Write scripts to stop containers in order, such as stopping db, app and web containers.