查询处理-PHP Tutorial-php.cn

Home

Backend Development

PHP Tutorial

查询处理

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jun 23, 2016 pm 01:28 PM

Query processing

这里是两张表在我输入多个标签序列化的时候存输入标签的id到A表, ID需要跟B表对应! 然后根据A表的id查询B表的标签id显示出B表ID对应的标签字段!这个关联查询该怎么来实现呢!

回复讨论(解决方案)

查询是件很具体的事情，所以你也必须给出具体的数据组织情况

A表:    tags   下面的字段都是序列化后的idB表:    TagName 是标签B表:     TagNameid 是标签ID 在PHP操作输入B表的标签名的时候序列化   然后存B表标签的ID到A表   然后在A表中根tagID查询出B表对应ID下面的标签.显示在前台..

select b.TagName from a a, b b where a.tagid=b.TagNameid

要的是具体的数据格式，而不是字段说明！

查询是件很具体的事情，所以你也必须给出具体的数据组织情况

A表:    tags   下面的字段都是序列化后的idB表:    TagName 是标签B表:     TagNameid 是标签ID 在PHP操作输入B表的标签名的时候序列化   然后存B表标签的ID到A表的tag  ..是存序列化后   然后在A表中根tagID查询出B表对应ID下面的标签.显示在前台..

B表

A表

你都不说明一下？
被人怎么会知道有什么对应关系？

现在主要怎么根据输入标签名称存的时候 A表存B表的标签ID 然后在做关联查询出数据!!! 版主求救活!

刚才没看到你回复不好意思.

在前台输入B表的标签名,然后序列化转成B表标签名的ID,存到A表的tag里面. 在通过A表tag的ID关联B表的tagnameid 查询出TanName下面的内容!

在你的截图中，并没有看到这种关系

我就想知道现在怎么才能在输入标签名的时候转换成标签ID存到A表

我不知道你输入了什么，也不知道他和标签ID 有什么关系

把你三个表画个关系图贴出来。初步理解：你输入标签名->从B表查出这个标签名在B中的ID->根据这个ID在A表中查出一个aID ->再到C表根据aID查出个内容。是不是这样

把你表画个关系图贴出来。初步理解：你输入标签名->从B表查出这个标签名在B中的ID->根据这个ID在A表中查出一个aID ->再到C表根据aID查出个内容。是不是这样

修改一下：
你输入标签名->从B表查出这个标签名在B中的ID->根据这个ID在A表中查出一个aID ->再到B表根据aID查出个内容->显示
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
感觉好复杂的说

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

11 Best PHP URL Shortener Scripts (Free and Premium)Mar 03, 2025 am 10:49 AM

Long URLs, often cluttered with keywords and tracking parameters, can deter visitors. A URL shortening script offers a solution, creating concise links ideal for social media and other platforms. These scripts are valuable for individual websites a

Introduction to the Instagram APIMar 02, 2025 am 09:32 AM

Following its high-profile acquisition by Facebook in 2012, Instagram adopted two sets of APIs for third-party use. These are the Instagram Graph API and the Instagram Basic Display API.As a developer building an app that requires information from a

Working with Flash Session Data in LaravelMar 12, 2025 pm 05:08 PM

Laravel simplifies handling temporary session data using its intuitive flash methods. This is perfect for displaying brief messages, alerts, or notifications within your application. Data persists only for the subsequent request by default: $request-

Simplified HTTP Response Mocking in Laravel TestsMar 12, 2025 pm 05:09 PM

Laravel provides concise HTTP response simulation syntax, simplifying HTTP interaction testing. This approach significantly reduces code redundancy while making your test simulation more intuitive. The basic implementation provides a variety of response type shortcuts: use Illuminate\Support\Facades\Http; Http::fake([ 'google.com' => 'Hello World', 'github.com' => ['foo' => 'bar'], 'forge.laravel.com' =>

Build a React App With a Laravel Back End: Part 2, ReactMar 04, 2025 am 09:33 AM

This is the second and final part of the series on building a React application with a Laravel back-end. In the first part of the series, we created a RESTful API using Laravel for a basic product-listing application. In this tutorial, we will be dev

cURL in PHP: How to Use the PHP cURL Extension in REST APIsMar 14, 2025 am 11:42 AM

The PHP Client URL (cURL) extension is a powerful tool for developers, enabling seamless interaction with remote servers and REST APIs. By leveraging libcurl, a well-respected multi-protocol file transfer library, PHP cURL facilitates efficient execution of various network protocols, including HTTP, HTTPS, and FTP. This extension offers granular control over HTTP requests, supports multiple concurrent operations, and provides built-in security features.

12 Best PHP Chat Scripts on CodeCanyonMar 13, 2025 pm 12:08 PM

Do you want to provide real-time, instant solutions to your customers' most pressing problems? Live chat lets you have real-time conversations with customers and resolve their problems instantly. It allows you to provide faster service to your custom

Announcement of 2025 PHP Situation SurveyMar 03, 2025 pm 04:20 PM

The 2025 PHP Landscape Survey investigates current PHP development trends. It explores framework usage, deployment methods, and challenges, aiming to provide insights for developers and businesses. The survey anticipates growth in modern PHP versio

See all articles

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)

2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Repo: How To Revive Teammates

4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hello Kitty Island Adventure: How To Get Giant Seeds

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

How Long Does It Take To Beat Split Fiction?

3 weeks agoByDDD

R.E.P.O. Save File Location: Where Is It & How to Protect It?

3 weeks agoByDDD

Hot Tools

SublimeText3 Mac version

God-level code editing software (SublimeText3)

SublimeText3 Linux new version

SublimeText3 Linux latest version

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.