Related content about PHP MySQL Update statement

PHP MySQL Update statement is used to modify the data in the database table and plays an important role. This article will understand its statement.

UpdateData in the database

The UPDATE statement is used to update existing records in the database table.

Syntax

UPDATE table_name
SET column1=value, column2=value2,...WHERE some_column=some_value

Note: Please pay attention to the UPDATE syntax WHERE clause. The WHERE clause specifies which records need to be updated. If you want to leave out the WHERE clause, all records will be updated!

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 queries or commands to the MySQL connection.

Example

In the previous chapters of this tutorial, we created a table named "Persons" as shown below:

FirstName LastName Age

##Peter

The following example updates some data in the "Persons" table:

<?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,"UPDATE Persons SET Age=36
WHERE FirstName=&#39;Peter&#39; AND LastName=&#39;Griffin&#39;");mysqli_close($con);?>

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

##FirstName

LastName            

Age

##Peter                                                                                                                                                 33

This article details The Update statement is explained. For more learning materials, please pay attention to the php Chinese website to view.

Related recommendations:

Related knowledge about PHP MySQL Order By keyword

Master PHP MySQL Where clause

How to read data through PHP MySQL

The above is the detailed content of Related content about PHP MySQL Update statement. For more information, please follow other related articles on the PHP Chinese website!