数据库查询结果构建多维数组解决办法
数据库查询结果构建多维数组
我想将前面数据库查询出来的结果构建一个多维数组,数据库查询出来的第一个结果对应第一层嵌套,第二个结果对应第二层嵌套,如何做,事先声明我是菜鸟,请多指点
<br /> // 查询变量<br /> <br /> $sql1 = "select remark,name from arp_careset where typegroup ='dissect-position' order by id"; <br /> $rs1 = mysql_query($sql1); <br /> <br /> while($r1 = mysql_fetch_assoc($rs1)) <br /> { echo $r1['name']; <br /> <br /> $sql = "select group_concat(name) as name from arp_careset where typegroup <>'dissect-position' and typegroup like '%".$r1["remark"]."%' order by id";<br /> $rs = mysql_query($sql); <br /> <br /> while($r = mysql_fetch_array($rs)) <br /> { $ar = explode(',', $r['name']); <br /> echo join(' ', $ar); <br /> } }<br /> //构建数组<br /> <br /> $mem = array(<br /> array<br /> (<br /> lang_show(''),<br /> array<br /> (<br /> // 嵌套开始<br /> array(<br /> lang_show('account_manager'),<br /> //第二层嵌套<br /> array(<br /> 'group_list.php,1',<br /> )<br /> //第二层嵌套结束 <br /> ),<br /> // 嵌套结束<br /> ) <br /> ),<br /> );
------解决方案--------------------
你的数据组织给你的读出带来了很多不便
这样写
$rs = mysql_query("select name, SUBSTRING_INDEX(typegroup,'-',-1) as secondary, remark from arp_careset where SUBSTRING_INDEX(typegroup,'-',1)='dissect'");<br /> while($r = mysql_fetch_assoc($rs)) {<br /> echo $r['name']. '<br />';<br /> $rs1 = mysql_query("select name, SUBSTRING_INDEX(typegroup,'-',-1) as secondary, remark from arp_careset where SUBSTRING_INDEX(typegroup,'-',1)='$r[secondary]' and SUBSTRING_INDEX(typegroup,'-',-1) = '$r[remark]'");<br /> while($r = mysql_fetch_assoc($rs1)) {<br /> echo $r['name'] . ' ';<br /> }<br /> echo '<br />';<br /> }
体表
营养状况 分泌物 被毛 皮肤 眼/眼眶 四肢/尾巴 乳腺 外生殖器 肛门
淋巴结
腋窝淋巴结 颈部淋巴结 腹股沟淋巴结 肺部淋巴结 肠系淋巴结
头颈部
眼睑/角膜/瞳孔 牙齿/牙龈 耳 鼻 脑膜/全脑 颅骨 唾液腺 食管 气管 甲状腺
胸部
胸壁 横膈/纵膈 心脏 主动脉弓 肺及支气管
腹部
腹腔 肠系膜 脾脏 胰 肾脏
------解决方案--------------------
为什么说数据组织的不好呢?
主分组 typegroup 包含了两个类别信息
而按“邻接列表算法”应该只包含一个类别信息
从你的数据上看,需要通过 typegroup、remark 两个字段来唯一确认一个表象的归属
这实际上就是“邻接列表算法”了
虽然现在可以用 SUBSTRING_INDEX 函数去拆分 typegroup 来得到类别信息
但 SUBSTRING_INDEX 函数是 mysql 专有的。如果因为某些原因,以后更换了数据库系统,那代码修改量就太大了
虽然你可以将拆分的工作交给 php 完成,但众多的 like 将降低查询效率
程序也显得比较臃肿
------解决方案--------------------
创建多维数组示意
$res = array(); //这是结果数组<br> $rs = mysql_query("select name, SUBSTRING_INDEX(typegroup,'-',-1) as secondary, remark from arp_careset where SUBSTRING_INDEX(typegroup,'-',1)='dissect'");<br> while($r = mysql_fetch_assoc($rs)) {<br> $tmp = array(); //初始化一个临时数组<br> $rs1 = mysql_query("select name, SUBSTRING_INDEX(typegroup,'-',-1) as secondary, remark from arp_careset where SUBSTRING_INDEX(typegroup,'-',1)='$r[secondary]' and SUBSTRING_INDEX(typegroup,'-',-1) = '$r[remark]'"); <div class="clear"> </div>

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

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

MySQL is an open source relational database management system, mainly used to store and retrieve data quickly and reliably. Its working principle includes client requests, query resolution, execution of queries and return results. Examples of usage include creating tables, inserting and querying data, and advanced features such as JOIN operations. Common errors involve SQL syntax, data types, and permissions, and optimization suggestions include the use of indexes, optimized queries, and partitioning of tables.

MySQL's position in databases and programming is very important. It is an open source relational database management system that is widely used in various application scenarios. 1) MySQL provides efficient data storage, organization and retrieval functions, supporting Web, mobile and enterprise-level systems. 2) It uses a client-server architecture, supports multiple storage engines and index optimization. 3) Basic usages include creating tables and inserting data, and advanced usages involve multi-table JOINs and complex queries. 4) Frequently asked questions such as SQL syntax errors and performance issues can be debugged through the EXPLAIN command and slow query log. 5) Performance optimization methods include rational use of indexes, optimized query and use of caches. Best practices include using transactions and PreparedStatemen

MySQL is chosen for its performance, reliability, ease of use, and community support. 1.MySQL provides efficient data storage and retrieval functions, supporting multiple data types and advanced query operations. 2. Adopt client-server architecture and multiple storage engines to support transaction and query optimization. 3. Easy to use, supports a variety of operating systems and programming languages. 4. Have strong community support and provide rich resources and solutions.

Apache connects to a database requires the following steps: Install the database driver. Configure the web.xml file to create a connection pool. Create a JDBC data source and specify the connection settings. Use the JDBC API to access the database from Java code, including getting connections, creating statements, binding parameters, executing queries or updates, and processing results.

The process of starting MySQL in Docker consists of the following steps: Pull the MySQL image to create and start the container, set the root user password, and map the port verification connection Create the database and the user grants all permissions to the database

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

Laravel is a PHP framework for easy building of web applications. It provides a range of powerful features including: Installation: Install the Laravel CLI globally with Composer and create applications in the project directory. Routing: Define the relationship between the URL and the handler in routes/web.php. View: Create a view in resources/views to render the application's interface. Database Integration: Provides out-of-the-box integration with databases such as MySQL and uses migration to create and modify tables. Model and Controller: The model represents the database entity and the controller processes HTTP requests.

The key to installing MySQL elegantly is to add the official MySQL repository. The specific steps are as follows: Download the MySQL official GPG key to prevent phishing attacks. Add MySQL repository file: rpm -Uvh https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm Update yum repository cache: yum update installation MySQL: yum install mysql-server startup MySQL service: systemctl start mysqld set up booting
