Detailed introduction to the method of deleting multiple records in ThinkPHP

When developing projects using the ThinkPHP framework, database operations are often required, and deleting multiple records is also a common requirement. This article will start with the principle of deleting multiple records, combined with specific code examples, to introduce in detail how to delete multiple records in ThinkPHP.

Principle of deleting multiple records

In the database, the operation of deleting multiple records can be implemented using the DELETE statement. The usage of the DELETE statement is as follows:

DELETE FROM 表名 WHERE 条件

Among them, the table name indicates the name of the table whose records are to be deleted, and the condition indicates which records are to be deleted. In ThinkPHP, you can use the delete method of the Db class to implement the deletion operation. The usage of the delete method is as follows:

Db::name('表名')->where('条件')->delete();

Among them, the name method is used to specify the table where the records are to be deleted, the where method is used to specify which records are to be deleted, and the delete method is used to perform the deletion operation.

Example of deleting multiple records

Suppose there is a students table with two columns: id and name. Now you want to delete all records named Zhang San. You can follow the following steps:

1. Introduce the Db class into the Controller:

use think\Db;

2. In a method of the Controller, use the delete method to delete all names. Zhang San’s record:

Db::name('students')->where('name', '张三')->delete();

The complete code is as follows:

<?php

namespace app\index\controller;

use think\Controller;
use think\Db;

class Index extends Controller
{
    public function deleteStudents()
    {
        // 删除所有名字为张三的记录
        Db::name(&#39;students&#39;)->where('name', '张三')->delete();
    }
}

Summary

Through the above example, we can see that deleting multiple entries in ThinkPHP Recording is very simple. Just use the delete method of the Db class to set the table name and deletion conditions. At the same time, we need to be careful when performing deletion operations to avoid accidentally deleting data.

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