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- Implementing MySQL Change Data Capture (CDC) Solutions
- MySQLCDC realizes data change capture by reading binlog, and the selection needs to consider tools, configuration and deployment. 1. In principle, binlog should be set as ROW mode and enable relevant permissions; 2. The tool can be selected as Debezium, Canal, Maxwell or self-developed programs, and make decisions based on the message queue foundation, technology stack and delay tolerance; 3. The deployment needs to ensure coordination between MySQL configuration, CDCagent, message middleware and consumers, and pay attention to network, breakpoint continuous transmission, performance and security; 4. Log cleaning, offset inconsistency, event accumulation, and DDL support should be handled during operation and maintenance, and periodically monitored to prevent risks.
- Mysql Tutorial . Database 153 2025-08-02 07:03:00
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- Type Hinting Iterables: Modern Best Practices for Functions Using foreach
- Using iterable type prompt is the best way to handle iterable data, because it supports arrays, generators, and Traversable objects, avoid unnecessary data conversion and improve code flexibility; 1. Priority is used instead of array or Traversable to be compatible with all iterable structures; 2. Only use array types when array-specific operations are required; 3. The return value should also use iterable to maintain implementation flexibility; 4. Avoid using Traversable alone because it does not support arrays; 5. Combined with PHPDoc annotation such as @paramiterable to clarify key-value types. This ensures that the code is clear, efficient and easy to maintain
- PHP Tutorial . Backend Development 637 2025-08-02 06:45:00
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- From Switch to Strategy: Decoupling Logic with Polymorphic Alternatives
- When you see a switch statement based on type or state, it should be replaced with polymorphism to improve code quality. 1. Encapsulate the behavior inside the object by defining the abstract base class Order and allowing each order type to implement its own process method. 2. The client code directly calls order.process() without conditional judgment. 3. When adding an order type, you only need to add a new class, without modifying the existing code, and it complies with the principle of opening and closing. 4. Switch can be retained in scenarios such as cross-sectional logic or external data processing, but should be considered for packaging using factory or policy mode. 5. For complex behaviors, a policy pattern can be introduced, the algorithm can be independently encapsulated and dynamically injected to achieve decoupling. Finally, we can obtain a scalable, easy-to-maintain, and highly cohesive code structure
- PHP Tutorial . Backend Development 125 2025-08-02 06:40:01
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- What is the HTML body tag and what does it contain
- TheHTMLtagdefinesthemainvisiblecontentofawebpageandmustappearonlyonceinsidetheelementafterthesection;itcontainsalluser-visibleelementssuchas1.headings(to),2.paragraphs(),3.links(),4.images(),5.lists(,,),6.tables(,,),7.formsandinputelements(,,),8.divi
- HTML Tutorial . Web Front-end 134 2025-08-02 06:37:02
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- How to Set Up MySQL Replication: A Step-by-Step Guide
- EnsurebothMySQLserversarecompatible,themasterhasbinaryloggingenabled,andnetworkconnectivityexistswithstaticIPsorhostnames.2.Onthemaster,edittheMySQLconfigtosetserver-id=1,enablelog_bin,usebinlog_format=ROW,thenrestartMySQL,createareplicationuserwithR
- Mysql Tutorial . Database 859 2025-08-02 06:24:01
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- How to Optimize MySQL Queries for Faster Performance?
- UseproperindexingstrategicallybycreatingindexesoncolumnsinWHERE,JOIN,ORDERBY,andGROUPBYclauses,suchasindexingtheemailcolumnforfasterlookups,andapplyingcompositeindexeslikeidx_user_statuson(user_id,status)whilerespectingleftmostprefixrules,butavoidove
- Mysql Tutorial . Database 884 2025-08-02 06:13:00
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- How to create a bouncing animation with CSS?
- Define@keyframesbouncewith0%,100%attranslateY(0)and50%attranslateY(-20px)tocreateabasicbounce.2.Applytheanimationtoanelementusinganimation:bounce0.6sease-in-outinfiniteforsmooth,continuousmotion.3.Forrealism,use@keyframesrealistic-bouncewithscale(1.1
- CSS Tutorial . Web Front-end 940 2025-08-02 05:44:01
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- How to create a pre-selected option in an HTML dropdown menu
- To create pre-selected options in the HTML drop-down menu, you need to add a selected attribute in the target tag; for example, Banana will make "Banana" selected by default when the page is loaded; 1. Only one option should contain a selected attribute (unless it is a multiple-select drop-down box); 2. Selected is a Boolean attribute, which can be effective as long as it exists, without assignment; 3. If there is no selected attribute, the browser usually selects the first option by default; 4. It can be dynamically pre-selected based on user data in combination with JavaScript (such as setting value) or server language; 5. This method is simple and natively supported, suitable for static and dynamic scenarios.
- HTML Tutorial . Web Front-end 181 2025-08-02 05:27:02
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- How to use CASE statements in MySQL for conditional logic?
- CASEstatementsinMySQLprovideconditionallogicinSQLqueries,withtwoforms:searchedCASEformultipleconditionsandsimpleCASEformatchingasingleexpressionagainstvalues;2.SearchedCASEisusedtocategorizedatabasedonconditions,suchasassigningcustomertiersbyspending
- Mysql Tutorial . Database 848 2025-08-02 04:44:01
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- How to build a simple HTML page from the ground up
- Setupatexteditorandbrowser,createaprojectfolder.2.Createindex.htmlwiththebasicHTML5structureincludingdoctype,html,head,andbodytags.3.Addcontentlikeheadings,paragraphs,lists,links,andimageswithinthebody.4.Savethefileandopenitinabrowsertoviewchanges.5.
- HTML Tutorial . Web Front-end 577 2025-08-02 04:38:02
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- Designing MySQL Databases for E-commerce Product Catalogs
- The design of e-commerce product catalog databases requires attention to clear structure, strong scalability and high query efficiency. 1. The core table includes products, categories, product_categories, attributes, attribute_values, product_attributes, inventory, and prices to ensure flexible data management; 2. Multiple SKUs are stored independently through skus tables, associate products and record inventory, prices and attribute combinations to improve management efficiency; 3. Classification adopts closure table structure, and category_closure table storage hierarchical relationships to optimize read performance; 4. Attribute expansion adopts EAV
- Mysql Tutorial . Database 893 2025-08-02 04:36:01
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- How to create a sticky table header with CSS?
- To create a sticky table header, use position:sticky; 1. Use a standard table structure to include head and tbody; 2. Set position:sticky, top:0, background color and z-index for headth; 3. Set tbody to display:block and set fixed height and overflow-y:auto for independent scrolling; 4. It is recommended to use table-layout:fixed to keep the column width consistent; 5. Make sure that the parent container has no overflow:hidden to avoid cutting sticky headers. This method allows the header to always be fixed at the top of the viewport when the page is scrolling.
- CSS Tutorial . Web Front-end 122 2025-08-02 04:28:01
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- How to create a responsive sidebar with CSS?
- Use HTML and CSS to create responsive sidebars; 2. The desktop side is laid sidebars with content through Flexbox; 3. The mobile side sets the sidebars to vertical stacking or hidden sliding display through media queries; 4. Optionally, the mobile menu switching can be achieved through the checkbox hack; 5. Key tips include using modern layout technology, multi-device testing and ensuring accessibility, and ultimately implementing adaptive sidebar design without frameworks.
- CSS Tutorial . Web Front-end 516 2025-08-02 04:23:00
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- How to use HTML progress element for task completion bars
- Use HTML elements to create semantic and accessible progress bars. 1. The basic syntax includes value (current progress) and max (total progress), if it means 30% completion; 2. The value is omitted and displayed as an animation bar with uncertain progress; 3. It can be used for scenes such as form filling or file upload, and dynamically update progress through JavaScript; 4. Support cross-browser style customization of CSS pseudo-elements, such as ::-webkit-progress-value and ::-moz-progress-bar; 5. Note that it is suitable for quantifiable tasks and cannot be used in scenarios such as instruments or disk usage, and elements should be used instead. This element is accessible by default and is recommended when real-time feedback is required and styled
- HTML Tutorial . Web Front-end 303 2025-08-02 04:17:01
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