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Article Introduction：Joining Tables with ssp.class.phpDataTables Table plug-in for jQuery provides a convenient way to display data in tabular format. However, it does...

2024-11-15 comment 0  1198

Article Introduction：WordPress editing dates can be canceled in three ways: 1. Install the Enable Post Date Disable plug-in; 2. Add code in the functions.php file; 3. Manually edit the post_modified column in the wp_posts table.

2025-04-20 comment 0  717

Article Introduction：Optimizing large WordPress websites requires starting from four aspects: database, caching, image management and plug-in control. 1. Database optimization: Regularly clean redundant data, use cache, split table structure and optimize indexes to improve query efficiency; 2. Efficient caching strategy: combine page cache, object cache and CDN acceleration to reasonably set cache expiration time; 3. Image management: compress pictures, adopt WebP format, enable delayed loading, and consider external storage to reduce server pressure; 4. Plug-in control: streamline the number of plug-ins, select high-quality plug-ins, and regularly evaluate performance impact, and use code to replace plug-in functions if necessary.

2025-07-23 comment 0  129

Article Introduction：In WordPress plug-in or theme development, the update() method of the wpdb class can be used to achieve database record updates. The basic structure is: $wpdb->update($table,$data,$where,$format,$where_format). 1.$table specifies the table name, such as $wpdb->prefix.'my_table'; 2.$data is an associative array, indicating the data to be updated, such as ['column1'=>'value1']; 3.$where is also an associative array, specifying the update conditions, such as ['id'=>123]; 4.$forma

2025-07-18 comment 0  353

Article Introduction：Fifteen practical jQuery sorting plug-ins to help you easily manage web elements! Core points: This article lists 15 powerful jQuery sorting plugins that can effectively control the order, location and organization of pages or table elements. Each plug-in has unique features, ranging from simple content sorting, sortable table layout, animated table sorting to advanced search user interfaces, with rich and diverse features. The jQuery sorting plugin is a powerful tool to improve website interactivity and user-friendliness, especially when dealing with large data sets or list views. The sorting feature is very useful for handling large datasets such as table views and can also be used to manage list views such as portfolio pages. This article will quickly introduce 15 very convenient js

2025-02-25 comment 0  1149

Article Introduction：1. Use plug-ins such as WPCrontrol or AdvancedCronManager to view Cron events directly in the background; 2. You can also view cron key values ??by accessing the database wp_options table; 3. When debugging exceptions, you can disable WP-Cron and set system Cron tasks to improve reliability; 4. Manually running or deleting events can be achieved through plug-ins or adding code. It is recommended to give priority to using plug-in management. Users who are familiar with SQL can choose database operations, and pay attention to the trigger mechanism and the impact of visits during debugging.

2025-07-01 comment 0  876

Article Introduction：To migrate subsites in WordPress multi-site to a single site, you need to perform the following steps in turn: 1. Use WordPress's own export tool to export articles, pages, etc.; 2. Export the table with the corresponding prefix from the database and rename it to a single-site format, and replace the old domain name at the same time; 3. Manually migrate media files and repair paths; 4. Configure the themes, plug-ins and settings of the new site and conduct tests. The entire process requires attention to data cleaning, URL replacement and plug-in compatibility to ensure normal functions after migration.

2025-07-19 comment 0  1045

Article Introduction：Deadlock is a deadlock caused by multiple transactions waiting for each other to release resources, such as transaction A locks table X waiting for table Y, transaction B locks table Y waiting for table X. Troubleshooting methods include: 1. MySQL uses SHOWENGINEINNODBSTATUS\G to view recent deadlock information; 2. SQLServer querys blocking sessions through Profiler or sys.dm_exec_requests; 3. PostgreSQL enables logs or plug-in to analyze deadlocks. Solutions and preventive measures include: 1. Unify the order of multi-table access; 2. Shorten the transaction execution time; 3. Reduce lock competition with lower isolation levels; 4. Add indexes to WHERE conditions during batch updates; 5. The application layer captures deadlock errors and automatically re-replaces them.

2025-07-05 comment 0  484

Article Introduction：The default user name of MySQL is usually 'root', but the password varies according to the installation environment; in some Linux distributions, the root account may be authenticated by auth_socket plug-in and cannot log in with the password; when installing tools such as XAMPP or WAMP under Windows, root users usually have no password or use common passwords such as root, mysql, etc.; if you forget the password, you can reset it by stopping the MySQL service, starting in --skip-grant-tables mode, updating the mysql.user table to set a new password and restarting the service; note that the MySQL8.0 version requires additional authentication plug-ins.

2025-06-13 comment 0  728

Article Introduction：Define user data and use ref to create responsive variables; 2. Use computed attributes to realize search filtering, support multi-field matching of name, mailbox and roles; 3. Add clickable table headers, update sorting keys and directions, and implement ascending descending sorting in computed; 4. Bind search input and table data in the template, display sorting arrows and process empty result prompts; 5. Optimize user experience, such as ignoring case, anti-shake search and optional sorting reset; finally use Vue3's responsive system to build a complete table without relying on plug-ins, suitable for small and medium-sized data sets, and the logical code is less than 50 lines.

2025-08-11 comment 0  342

Article Introduction：When WordPress databases run slowly, you can improve performance by regularly cleaning up junk data, optimizing table structure and indexing, enabling caching mechanisms, and adjusting database server configuration. 1. Regularly clean up spam data, such as article revisions, drafts, spam comments, etc. You can use plug-ins or manually execute SQL statements to delete it. It is recommended to once a month. 2. Optimize the database table structure and index, add indexes to high-frequency query fields (such as wp_postmeta's meta_key) to improve query efficiency, but avoid excessive indexing affecting write performance. 3. Enable the cache mechanism, such as object cache (Redis/Memcached) or use the cache plug-in (W3TotalCache/WPSuperCache), and cooperate with C

2025-08-05 comment 0  957

Article Introduction：Debugging MySQL stored procedures and functions can be achieved through the following methods: 1. Use SELECT to output intermediate values, such as SELECT'Current User ID:',userId; 2. Write debug information to the log table, create debug_log table and insert runtime variables; 3. Use the MySQLWorkbench debug plug-in to set breakpoints and view variables; 4. Pay attention to the impact of transactions and error handling on debugging, and it is recommended to comment transactions or add error output. These methods can be used in combination to effectively troubleshoot problems.

2025-08-03 comment 0  905

Article Introduction：There are three ways to connect Excel to MySQL database: 1. Use PowerQuery: After installing the MySQLODBC driver, establish connections and import data through Excel's built-in PowerQuery function, and support timed refresh; 2. Use MySQLforExcel plug-in: The official plug-in provides a friendly interface, supports two-way synchronization and table import back to MySQL, and pay attention to version compatibility; 3. Use VBA ADO programming: suitable for advanced users, and achieve flexible connections and queries by writing macro code. Choose the appropriate method according to your needs and technical level. PowerQuery or MySQLforExcel is recommended for daily use, and VBA is better for automated processing.

2025-07-16 comment 0  855

Article Introduction：Creating a data model is not complicated in Excel. It is a "backend database" that integrates multiple tables, supports relational connections, and is used for advanced analytics. To use a data model, first, you need to check the "Add this data to the data model" option when inserting the pivot table. This is the first step in adding data; second, establish a relationship in the correct direction through common fields such as customer ID in PowerPivot or management model; finally, cross-table statistical analysis can be combined with multiple tables, which is often used in sales analysis, costing, performance tracking and other scenarios. It is recommended to enable the PowerPivot plug-in and save it in .xlsx format to retain the model function.

2025-07-23 comment 0  846

Article Introduction：When encountering WordPress database connection errors, the most common reason is that the database cannot be accessed normally. You can troubleshoot through the following steps: 1. Check whether the database name, user name, password and DB_HOST in the wp-config.php file are correct, especially if the host is replaced or the settings may not be updated; 2. Confirm whether the database service is running normally, check the database status through the control panel, phpMyAdmin or the command line; 3. Clear the cache and check plug-in conflicts, clear all types of caches and disable plug-ins to check one by one; 4. Check whether the database is corrupt, and try to repair the table structure using phpMyAdmin or the built-in repair function of the system.

2025-08-11 comment 0  169

Article Introduction：There are many reasons why MySQL startup fails, and it can be diagnosed by checking the error log. Common causes include port conflicts (check port occupancy and modify configuration), permission issues (check service running user permissions), configuration file errors (check parameter settings), data directory corruption (restore data or rebuild table space), InnoDB table space issues (check ibdata1 files), plug-in loading failure (check error log). When solving problems, you should analyze them based on the error log, find the root cause of the problem, and develop the habit of backing up data regularly to prevent and solve problems.

2025-04-08 comment 0  871

Article Introduction：Key ways to implement audit functions in SQL databases include: 1. Use the built-in audit functions of the database, such as MySQL generallog or enterprise version plug-in, PostgreSQL pg_log_statement or pgAudit, and SQLServer SQLServerAudit; 2. Use triggers to record changes in specific tables, and record operations into the audit log table by creating trigger functions; 3. Record operation context information, such as user ID, IP address, etc. at the application layer to supplement the shortcomings of the database log; 4. Unify the log format and centrally manage it, use ELK or Splunk tools for log analysis and storage, and set access control prevention

2025-07-24 comment 0  190

Article Introduction：MySQL Trigger: Automated Database Management MySQL Trigger is a powerful database feature that allows you to automatically perform predefined actions when specific events occur in tables, such as insertion, update, or delete. This is critical to implementing business rules, maintaining data integrity, and documenting database changes without explicit management in application code. This article will explore in-depth the concept, usage of MySQL triggers, and some practical examples. What is a MySQL trigger? A trigger is essentially a set of SQL statements that are automatically executed by the MySQL database system when a specific event occurs on the table. These events include: INSERT: Triggered when a new row is inserted into the table. UPDATE: Fired when an existing row in the table is updated. DE

2025-04-08 comment 0  768

Article Introduction：Notes on using activation hooks in WordPress plug-in development include: 1. Using register_activation_hook is a standard practice. The processing function should be bound to centralized initialization logic to avoid time-consuming operations; 2. In a multi-site environment, additional network activation needs to be handled, and the wpmu_new_blog hook can be listened to; 3. Cleaning and error handling after activation cannot be ignored. It is recommended to save the activation flag bit, prompt error information and catch exceptions. For example, when creating a database table, use the dbDelta function to cooperate with the global $wpdb object to complete the structure initialization, and at the same time, use get_option and update_option to avoid repeated execution of activation logic.

2025-07-26 comment 0  519

Article Introduction：The key points of upgrading MySQL5.7 to 8.0 on Windows include: 1. Back up the database and configuration files, use mysqldump to export all databases and copy the data folder; 2. Download and install the MySQL8.0 MSI package, select the upgrade option or manually replace the ZIP installation file; 3. Update the character set and authentication plug-in settings in the configuration file; 4. Run mysql_upgrade to check and repair the system table; 5. When encountering problems, check the log, force the old authentication method or re-register the service. The entire process needs to be handled with caution to ensure a smooth upgrade.

2025-06-26 comment 0  672