PHP MySQL Update

Update the data in the database

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

grammar

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

notes ： Please note that UPDATE The grammatical WHERE Clause .WHERE Clause specifies which records need to be updated . If you want to omit WHERE Clause , All records will be updated ！

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In order to make PHP Execute the above statement , We have to use mysqli_query() function . This function is used to send a message to MySQL Connect to send queries or commands .

example

In previous chapters of this tutorial , We created a "Persons" Table of , As shown below ：

FirstName	LastName	Age
Peter	Griffin	35
Glenn	Quagmire	33

The following example updates "Persons" Some data of the table ：

example

<?php
$con=mysqli_connect("localhost","username","password","database");
// Detection connection
if (mysqli_connect_errno())
{
        echo " The connection fails : " . mysqli_connect_error();
}

mysqli_query($con,"UPDATE Persons SET Age=36
WHERE FirstName='Peter' AND LastName='Griffin'");

mysqli_close($con);
?>

After this update ,"Persons" The table is shown below ：

FirstName	LastName	Age
Peter	Griffin	36
Glenn	Quagmire	33