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Found a total of 10000 related content
Self-study IT network Linux load balancing video tutorial

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Course Introduction:"Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

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  • Improve performance of MYSQL queries with one-to-many relationships

    I have a query in my database that takes 25 seconds to return results, which is too long. It seems like it should be pretty simple. Two tables; the main table (document) is a standard table with some data columns, and the connection table is a mapping table with only two columns (parent_id, division_id). Previously there was no index on the mapping table, so I added an index and changed the "interpretation" to include the index, but it seems to have no impact on performance. The query looks like this: explainSELECTDISTINCTdoc.*FROMdocumentdocLE

    2024-03-28 23:17:19 0  1  512

  • Pagination, can the data array queried using SQL statements be paginated? $list=query($sql); It seems that the paginate() method cannot be used

    Can the data array queried using SQL statements be paginated? $list=query($sql); It seems that the paginate() method cannot be used

    2018-03-26 23:56:10 0  5  1653

  • Is there any way in Mysql to query a string inside another string?

    Is there any way to query MySQL? For example, the string '3,5' is in the string '3,4,5,2'. The situation is probably like this. The user has multiple attributes, and the attribute ID is stored in a field in the user table, such as user_attr , the value storage format is: '3,4,5,2', explanation: for example, the number is the attribute ID. Now the front-end needs

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  • SQL statement, how can we query the first word of this field in the data table through a Chinese character?

    SQL statement, how can we query the first word of this field in the data table through a Chinese character?

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  • PHP—Implementation of questionnaire survey function based on Yii2 framework

    The questionnaire based on the Yii2 framework has three types of questions: single-choice, multiple-choice, and text input. How can these three functions be implemented using PHP language? I'm urgently looking for the answer, thank you!

    2019-08-22 17:41:19 0  1  1392

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PHP implements logistics query function

Course Introduction:With the continuous development of the e-commerce industry, more and more people choose to shop online. In this process, the logistics inquiry function has become a necessary service, because it allows consumers to know the transportation status of their goods and the estimated arrival time at any time. In this article, we will introduce how to use PHP to implement the logistics query function. 1. What is the logistics query function? The logistics query function refers to querying the logistics information of the user's goods through the official website of the logistics company or the third-party logistics query platform, such as express delivery order number, route, recipient, sender, and signature.

2023-06-22 comment 0  1484

How to implement product query function in php

Course Introduction:How to implement the product query function in PHP: 1. Create a PHP sample file; 2. Create a product query form, and users can submit query conditions to the server through these input boxes; 3. Use the query conditions submitted by the user on the server side Obtain it with PHP language and splice it into an SQL query statement; 4. Use PHP to connect to the database, execute the SQL query statement, and obtain product data that meets the conditions; 5. Process the queried product data using PHP language, splice it into HTML format, and return it to Users can complete the product query function.

2023-06-06 comment 0  1632

How to implement search query function in php

Course Introduction:PHP search query function With the development of the Internet, online searches have become more and more common. Whether it is an e-commerce website or a blogging website, search functionality is crucial. In PHP, it is not difficult to implement a search query function. This article will introduce how to use PHP to write a search query function. 1. Database settings Before using PHP to implement search queries, you must first set up the database. First you need to create a database and add data tables to it. The data table should contain the data fields to be searched, such as article title, content, author, etc. 2. Write search

2023-04-10 comment 0  1361

php结合ACCESS的跨库查询功能,phpaccess跨库

Course Introduction:php结合ACCESS的跨库查询功能,phpaccess跨库。php结合ACCESS的跨库查询功能,phpaccess跨库 问题说明: 有时需要在两个或三个数据库的表中,通过相关关键字,查询获取所需记录集,用一般

2016-06-13 comment 0  1011

How to use PHP and Vue to implement data query function

Course Introduction:How to use PHP and Vue to implement data query function In recent years, with the continuous development of Internet technology, data query function plays an important role in various Web applications. PHP and Vue are two very commonly used technologies, and their combination can effectively implement data query functions. This article will introduce how to use PHP and Vue to build a simple data query function, and provide specific code examples. 1. Overview To implement the data query function, we need to first build a backend service to handle data requests and returns. PH

2023-09-25 comment 0  1314

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