Found a total of 10000 related content
How to display multiple lines as one line in SQL
Article Introduction：Tips for combining multiple rows of data into one row in SQL include: using the CONCAT function to connect strings, such as dividing names into full names. Use the GROUP_CONCAT function to connect the values ??of all rows in the group, such as grouping the product list. Use the STRING_AGG function to connect strings and specify delimiters, such as grouping skill lists and adding delimiters. Use the FOR XML PATH('') clause to convert the query results to an XML string. Use the STUFF function to insert substrings, such as converting the customer name to a line with an XML tag.
2025-04-10
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772
Explain Angular routing
Article Introduction：The function of Angular routing is to realize page jump and view switching in single-page applications. 1. The basic routing function can be realized by introducing RouterModule and Routes, configuring the routing table in the root module or using lazy loading method to load in modules; 2. Use the router-outlet tag to specify the display location of the routing component, and implement local page updates through the routerLink instruction; 3. Dynamic routing can be defined by adding parameters (such as /user/:id) to the path and injecting ActivatedRoute into the component; 4. Nested routing defines the child routing structure through the children attribute, and the parent component needs to add router-outlet to
2025-07-04
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893
How to create a hyperlink in HTML5?
Article Introduction：The core of creating a hyperlink in HTML5 is to use tags. 1. Use the tag and use the href attribute to specify the target address, for example, click here to visit the sample website; 2. The href can be an absolute path or a relative path; 3. Add target="_blank" to allow the link to open in a new window; 4. The link content can be text, pictures or buttons, such as using pictures as links; 5. Useful link buttons in combination with CSS; 6. Practical suggestions include ensuring the accuracy of the path, adding title prompts, paying attention to accessibility and testing the effectiveness of the link. Mastering these details can help better apply the hyperlink function in real projects.
2025-07-31
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887
What are Fragments in Vue 3?
Article Introduction：Fragments is a function in Vue3 that allows components to return multiple root nodes. In Vue2, everything must be wrapped with a single element. 1.Fragments allows components to directly return multiple parallel nodes, such as the sum does not need to be wrapped in the parent element; 2. It improves structural semantics, avoids unnecessary nesting, optimizes layout and performance; 3. Simple usage, just write multiple top-level nodes directly under the tag; 4. Notes include ref management problems caused by the lack of unified parent nodes, scoped style scope impact, and Transition animation restrictions, which are usually solved by manually processing refs or adding package containers.
2025-07-17
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899
Implementing Native Lazy Loading for Images in HTML
Article Introduction：Native lazy loading is a built-in browser function that enables lazy loading of pictures by adding loading="lazy" attribute to the tag. 1. It does not require JavaScript or third-party libraries, and is used directly in HTML; 2. It is suitable for pictures that are not displayed on the first screen below the page, picture gallery scrolling add-ons and large picture resources; 3. It is not suitable for pictures with first screen or display:none; 4. When using it, a suitable placeholder should be set to avoid layout jitter; 5. It should optimize responsive image loading in combination with srcset and sizes attributes; 6. Compatibility issues need to be considered. Some old browsers do not support it. They can be used through feature detection and combined with JavaScript solutions.
2025-07-12
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855
Dave The Diver: How To Catch Spider Crabs
Article Introduction：In Dave The Diver, there are some creatures that are not easy to catch. Or, catch alive that is. The spider crab is one of those very species, making it seem like the only way to bring these crustaceans back up to land is to viciously crack them up w
2025-01-10
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864
Prepare for Interview Like a Pro with Interview Questions CLI
Article Introduction：Prepare for Interview Like a Pro with Interview Questions CLI
What is the Interview Questions CLI?
The Interview Questions CLI is a command-line tool designed for JavaScript learners and developers who want to enhance their interview
2025-01-10
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1490
Soft Deletes in Databases: To Use or Not to Use?
Article Introduction：Soft Deletes: A Question of DesignThe topic of soft deletes, a mechanism that "flags" records as deleted instead of physically removing them, has...
2025-01-10
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1084
Terraria: How To Make A Loom
Article Introduction：There are a lot of crafting stations that you can make in Terraria. This ranges from simple anvils to unique stations meant for one specific type of resource. Early into the game, you'll be able to make your own Loom, which is primarily used to make
2025-01-10
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