Knowledge about PHP MySQL Delete statement

PHP MySQL Delete statement is particularly important in PHP, so this article will explain its related knowledge in detail.

Delete data in the database

The DELETE FROM statement is used to delete records from the database table.

Syntax

DELETE FROM table_name
WHERE some_column = some_value

Note: Please note the WHERE clause in the DELETE syntax. The WHERE clause specifies which records need to be deleted. If you want to omit the WHERE clause, all records will be deleted!

To learn more about SQL, please visit our SQL tutorial.

In order for PHP to execute the above statement, we must use the mysqli_query() function. This function is used to send a query or command to the MySQL connection.

Example

Please look at the "Persons" table below:

##FirstName

LastName Age

#Peter Griffin 35

Glenn Quagmire 33

The following example deletes all LastName='Griffin' in the "Persons" table Records:

<?php
$con=mysqli_connect("localhost","username","password","database");// 检测连接if (mysqli_connect_errno()){    echo "连接失败: " . mysqli_connect_error();}mysqli_query($con,"DELETE FROM Persons WHERE LastName=&#39;Griffin&#39;");mysqli_close($con);?>

After this deletion, the "Persons" table looks like this:

FirstName

LastName

Age##Glenn                                 Quagmire       33  

This article explains in detail the usage of the PHP MySQL Delete statement. For more learning materials, please pay attention to php Chinese You can watch it online.

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