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- Explain the purpose and usage of the MySQL Performance Schema.
- MySQLPerformanceSchema is a tool for monitoring and optimizing database performance. Its functions include identifying performance bottlenecks and optimizing queries. 1) Enable PerformanceSchema to achieve by updating the setup_instruments table. 2) The basic usage includes viewing the current query and waiting for events. 3) Advanced usage involves analyzing the most frequent queries to optimize performance.
- Mysql Tutorial . Database 689 2025-04-06 00:02:31
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- Explain Arrow Functions (short closures) introduced in PHP 7.4.
- The arrow function was introduced in PHP7.4 and is a simplified form of short closures. 1) They are defined using the => operator, omitting function and use keywords. 2) The arrow function automatically captures the current scope variable without the use keyword. 3) They are often used in callback functions and short calculations to improve code simplicity and readability.
- PHP Tutorial . Backend Development 583 2025-04-06 00:01:51
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- How to select a child element with the first class name item through CSS?
- When the number of elements is not fixed, how to select the first child element of the specified class name through CSS. When processing HTML structure, you often encounter different elements...
- CSS Tutorial . Web Front-end 1031 2025-04-05 23:24:06
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- How to keep the elements of different background colors consistent in width?
- How to make the width of elements of different background colors consistent? Many web designs encounter this problem: two elements with different background colors need to be displayed side by side...
- CSS Tutorial . Web Front-end 881 2025-04-05 23:21:01
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- How to solve the problem of unnecessary background color when single line of text with background color overflows ellipsis?
- How to solve the problem of unnecessary background color when single line of text with background color overflows ellipsis? When dealing with single-line overflow of text with background color, you often encounter...
- CSS Tutorial . Web Front-end 540 2025-04-05 23:18:01
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- How to solve the problem of rem-element scaling using media query?
- Regarding the solution of rem equal-scale scaling, discussing the problem of using rem units for equal-scale scaling when developing responsive web pages, especially in control...
- CSS Tutorial . Web Front-end 1045 2025-04-05 23:15:02
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- There are gaps in three divs in the Vant Popup component: What CSS style is causing it?
- Vante...
- CSS Tutorial . Web Front-end 333 2025-04-05 23:12:01
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- How to create complex card styles using CSS' clip-path property?
- How to create complex card styles using CSS? In daily web design, card style is a common and important layout method. Today we want to explain...
- CSS Tutorial . Web Front-end 1085 2025-04-05 23:09:02
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- In Vue3 non-setup syntax sugar, how to use component props gracefully in CSS v-bind?
- How to gracefully in CSS in Vue3 non-setup syntax sugar...
- CSS Tutorial . Web Front-end 434 2025-04-05 23:06:01
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- How to solve the height problem by adjusting the rem unit in adaptive design?
- How to solve the height adjustment problem in adaptive design? In adaptive design, height adjustment is often a difficult problem. Especially when dealing with similar...
- CSS Tutorial . Web Front-end 985 2025-04-05 23:03:01
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- The text under Flex layout is omitted but the container is opened? How to solve it?
- The problem of container opening due to excessive omission of text under Flex layout and solutions are used...
- CSS Tutorial . Web Front-end 344 2025-04-05 23:00:02
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- How to use locally installed font files on web pages?
- How to use locally installed font files on web pages Have you encountered this situation in web page development: you have installed a font on your computer...
- CSS Tutorial . Web Front-end 525 2025-04-05 22:57:01
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- How to use the shape-outside attribute of CSS to achieve the display effect of gradually shortening text?
- Implementing the display effect of gradually shortening text In web design, how to achieve a special text display effect to make the text length gradually shortening? This effect...
- CSS Tutorial . Web Front-end 375 2025-04-05 22:54:01
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- How to achieve horizontal scrolling effect of horizontal options by rotating elements in CSS?
- How to achieve horizontal scrolling effect of horizontal options in CSS? In modern web design, how to achieve a horizontal tab-like effect and support the mouse...
- CSS Tutorial . Web Front-end 418 2025-04-05 22:51:01
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