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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
<?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='Peter' AND LastName='Griffin'");mysqli_close($con);?>After this update, the "Persons" table looks like this:
##FirstName LastName
##Peter 33
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