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Article Introduction：When processing time series data, MySQL's RANGE and LIST partitioning strategies can improve query performance and management efficiency. 1. Priority is given to RANGE partitions, and data is divided by time intervals, suitable for queries in continuous time periods; 2. LIST partitions are suitable for discrete time periods, such as quarterly reports, etc.; 3. Avoid using HASH or KEY partitions because they are not suitable for time range queries; 4. Partition fields should be of DATE, DATETIME or TIMESTAMP type and are commonly used filtering conditions for querying; 5. Partition fields must be part of primary key or unique index; 6. Use partitions to clean or archive old data efficiently, such as using TRUNCATEPARTITION or EXCHANGEPART

2025-07-17 comment 0  639

Article Introduction：jQuery plug-in: a powerful tool to improve development efficiency This article will explore the development of jQuery plug-ins in depth, explain its advantages and guide you to create your own plug-ins step by step. jQuery plug-in can significantly reduce development time and improve code reuse. Just write function code once and you can reuse it in multiple projects, greatly improving development efficiency. We will use a sample plugin called fancytoggle as an example to demonstrate various links of plug-in development. This plug-in is used to toggle the visibility of nested elements, such as list items, to create interactive components similar to the accordion, such as the FAQ section. You can visit CodePen to view the fancytoggle plugin

2025-02-17 comment 0  698

Article Introduction：SublimeText is a powerful and flexible code editor that is worthy of exploration by programmers. 1) It supports multiple selection and editing, allowing multiple locations to be modified at the same time. 2) The plug-in system is rich and extensible. 3) The basic usage is intuitive, and the advanced usage includes regular expressions and macros. 4) Common errors such as plug-in conflicts can be resolved by uninstalling or adjusting the configuration. 5) Performance optimization is achieved through management plug-ins and configuration files.

2025-04-30 comment 0  820

Article Introduction：Best practices for cross-browser date input This article explores the challenges and best solutions for implementing date input fields in various browsers. Due to inconsistent browser support and neglect of lang attributes, we need a robust solution to deal with date formats, UTC/local time issues, and differences between different browsers. Key points: The browser's support for and lang attributes is uneven, resulting in the inability to display input widgets in non-native languages. Many JavaScript solutions attempt to improve support for date input, but few scripts can handle two different date formats that display and save data at the same time. Datepicker for jQuery UI is a well-tested and supported

2025-02-20 comment 0  1116

Article Introduction：10 amazing jQuery carousel plugins to rejuvenate your website! Carousel plug-ins are essentially a display tool for continuously looping display media (for example, images are displayed at time intervals to ensure that each image is displayed on its turn). Enjoy it! rCarousel A continuous carousel plug-in based on jQuery UI. Theatre Carousel An amazing carousel plugin. You can add it to your page and this tutorial will guide you on how. Barousel A jQuery plugin that makes it easy to create simple carousels, where each slide is defined by images and any type of related content.

2025-03-06 comment 0  939

Article Introduction：SQL's CASEWHEN statement is used for conditional judgment and can be classified or converted. 1. The basic usage is to classify the field value, such as classifying the order amount; 2. Support multi-field combination judgment, such as grouping according to gender and age, suitable for complex classification scenarios; 3. Used in conjunction with aggregate functions to realize statistical functions, such as counting order counts in different time periods. Pay attention to the order of conditions, add ELSE, alias the result list, and recommend that when the logic is complex, disassemble the molecular query to improve readability.

2025-07-13 comment 0  670

Article Introduction：In SQL queries, multiple conditions can be combined using AND and OR to accurately filter data. 1. Use AND to indicate that all conditions must be met at the same time, such as looking for users who are older than 30 and whose city is Beijing; 2. Use OR to indicate that only one of the conditions must be met, such as looking for users who are Beijing or Shanghai; 3. Pay attention to priority when using mixed use, AND takes precedence over OR, and use brackets to clarify the logical relationship to avoid ambiguity; 4. Replacing multiple ORs with IN can make the statement more concise and easy to read, such as matching multiple city names. Use these logical operators and brackets reasonably to write accurate and clear query statements.

2025-07-11 comment 0  832

Article Introduction：AI design slicing tools can split design elements into independent parts, which is essential when developing digital products. Popular tools include: Adobe XD: suitable for UI/UX design, providing automatic layout and other slicing functions. Figma: A cloud-based collaboration tool that offers real-time slicing and multiple export options. Sketch: Implement slicing function through slice export plug-in. InVision Studio: A one-stop design tool that exports slices and snippets with one click. Framer: A tool for building prototypes with built-in slicing capabilities to generate React components for development.

2024-11-28 comment 0  351

Article Introduction：linkrel="dns-prefetch" is a lightweight front-end optimization method, suitable for scenarios where pages refer to multiple third-party resources or CDNs. When a web page uses external resources such as GoogleFonts, statistics scripts, alliance JS, or multiple CDN domain names, the DNS query time can be reduced by resolving the domain name in advance. The correct way to use it is to add: in HTML, but it should avoid abuse and be given priority to the domain names that must be loaded later. The difference between it and preconnect is that the latter also establishes TCP and TLS connections. The two can be used in combination, in the order of dns-prefetch first and then preconnect. Other points of attention include not being the main site

2025-07-19 comment 0  126

Article Introduction：MySQL 8.0 supports function indexing, allowing index creation on expressions to speed up queries. 1. Function index is an index created on an expression, such as UPPER(name) or DATE(created_at), so that query conditions can hit the index even if they use expressions. 2. The creation method is to wrap the expression in brackets, and the syntax is CREATEINDEXindex_nameONtable_name((expression)). 3. Usage scenarios include string processing, time extraction and JSON field extraction, etc., which can avoid full table scanning to improve performance. 4. Notes include that expressions must be deterministic, only support InnoDB engine, not full text or spatial indexing,

2025-07-19 comment 0  749

Article Introduction：All software cannot be updated at once, but the process can be simplified by combining tools and regular maintenance. First, use the "Settings" → "Windows Update" function that comes with Windows system to enable automatic updates to ensure that the operating system, drivers and some pre-installed software are kept up to date; second, use third-party batch update tools such as NiniteUpdater, SUMo or Chocolatey to centrally manage common software updates; at the same time, combine browser plug-in reminders such as Chrome's extended update prompts, and develop the habit of setting a "update day" checklist and viewing change logs every month, so as to efficiently complete software maintenance.

2025-07-17 comment 0  217

Article Introduction：The method of checking the status of Apple computer warranty is simple and effective. Users can use the following steps: 1. Obtain the serial number of the Mac, which can be found on the back of the device, on the page about this machine or in the order information; 2. Go to the Apple official warranty query page to enter the serial number and verification code to check the device model, factory time, standard warranty period and whether AppleCare is activated; 3. Log in to the AppleID to enter the support account page to view the detailed protection information of the bound device. If the device is second-hand and the original owner ID is bound to be bound, you need to contact unbind; 4. Pay attention to the start date of the warranty based on the delivery date, the purchase time of AppleCare is within 60 days after the purchase of the machine, and there may be differences in warranty policies in different regions. Just follow the above steps, that is,

2025-07-10 comment 0  422

Article Introduction：In the Laravel project, as the traffic increases, it is not uncommon for database to query speed. Recently, when I optimized the back end of a real estate platform, I encountered this problem and learned some lessons from it. Database optimization is one of the key areas for developing scalable and high -performance applications. It can improve the data retrieval speed, shorten the response time and page loading time, and reduce the server load, and minimize the cost. The challenge of the real estate platform Imagine: You build an excellent real estate platform that serves multiple cities and is equipped with advanced search filters. The real estate list loads fast, the search filter responds rapidly, and everything looks perfect. However, with the expansion of the application and the user base

2025-01-30 comment 0  935

Article Introduction：The time to use EXISTS is when you only need to know if there is a record that meets the criteria, such as finding customers with orders, checking whether the associated data exists, and avoiding repeated insertions. Its syntax is SELECTcolumn_listFROMtable_nameWHEREEXISTS(subquery). When the subquery returns at least one row, the outer query retains the current row. SELECT1 is commonly used to improve efficiency. NOTEXISTS can be used to find cases where unrelated records are found. Application recommendations include: selecting redundant fields, ensuring that subqueries are associated with the main query, and avoiding abuse when aggregates or multiple matches are required. In short, EXISTS is an efficient tool for judging existence, suitable for accurately filtering related data

2025-07-04 comment 0  241

Article Introduction：Database view is a tool in SQL that simplifies querying and enhances security. It is a saved SELECT statement, does not store data, and is executed dynamically every time you query. The benefits of using views include: 1. Simplify complex query logic; 2. Hide the underlying table structure; 3. Control user access rights. The syntax for creating a view is CREATEVIEWview_nameASSELECT..., for example, creating a view to view a "shipped" order. Update the view to use CREATEORREPLACEVIEW, delete the view to use DROPVIEW. Note when operating: the view name cannot be repeated, and the fields can come from multiple tables to avoid abuse of ORDERBY. Frequently asked questions include performance bottlenecks, permission dependencies, and update restrictions

2025-07-11 comment 0  644

Article Introduction：Adding voting in Microsoft Teams channel requires a third-party tool or built-in workaround, because Teams itself does not have native voting capabilities. 1. Use the Microsoft Forms application to create a questionnaire and share it to the channel; 2. Install the Polly plug-in to quickly initiate real-time voting that supports single-choice, multiple-choice or rating through instructions; 3. Use emoticon reactions (such as ?/?) to conduct a simple two-choice voting, no additional settings are required, but the statistical effect is limited. The above method can meet the voting needs in different scenarios.

2025-07-03 comment 0  209

Article Introduction：The method of using media query to satisfy multiple conditions at the same time in CSS is as follows: 1. Use and to connect multiple conditions to ensure that all conditions are true, such as @mediascreenand(min-width:600px)and(max-width:900px)and(min-device-pixel-ratio:2); 2. Use commas to represent the relationship of "or", as long as one of the conditions is satisfied, such as @media(max-width:480px),(max-height:320px); 3. The logical priority can be clarified through brackets to enhance readability; 4. Use not to negate a certain condition, such as @media, for example, @media(max-width:480px),(max-height:320px); 3. The logical priority can be clarified through brackets to enhance readability; 4. Use not to negate a certain condition, such as @media

2025-06-25 comment 0  461

Article Introduction：There is no need for plug-ins to adjust the VSCode font size, and it can be achieved by setting the interface or editing the settings.json file. 1. Use the settings interface: open settings by shortcut keys, search for fontsize and adjust the values, which takes effect in real time and intuitive operation. 2. Edit settings.json: Add fields such as "editor.fontSize":16 to manually configure it, suitable for fine control and synchronization of multiple devices. 3. Adjust the terminal font separately: add "terminal.integrated.fontSize":15 to the configuration file to achieve independent control. Both methods do not need to be restarted, and they will take effect immediately after modification. It is also recommended that

2025-07-14 comment 0  474

Article Introduction：Execution of SELECT queries using PHP's preprocessing statements can effectively prevent SQL injection and improve security. 1. Preprocessing statements separate SQL structure from data, send templates first and then pass parameters to avoid malicious input tampering with SQL logic; 2. PDO and MySQLi extensions commonly used in PHP realize preprocessing, among which PDO supports multiple databases and unified syntax, suitable for newbies or projects that require portability; 3. MySQLi is specially designed for MySQL, with better performance but less flexibility; 4. When using it, you should select appropriate placeholders (such as? or named placeholders) and bind parameters through execute() to avoid manually splicing SQL; 5. Pay attention to processing errors and empty results to ensure the robustness of the code; 6. Close it in time after the query is completed.

2025-07-12 comment 0  635

Article Introduction：The main differences between SQL subqueries and JOINs are structure, readability and performance. 1. Subqueries are suitable for scenarios where filtering or computing are based on another query result, especially for simple searches or conditional filtering; 2. JOIN is more suitable for efficiently merging data across tables, which can better optimize performance, and provide multiple types (such as INNERJOIN, LEFTJOIN) to control the data combination method; 3. In terms of readability, short subqueries may be more intuitive, but complex nested subqueries are poorly readable, so it is clearer to use JOIN or CTE at this time; 4. In terms of performance, JOIN is usually better than subqueries, especially when large data sets or reused use, and subqueries may be slower in specific situations; 5. When using it, note that JOIN may cause recurrence.

2025-07-02 comment 0  211