PHPMySQLUpdate

The UPDATE statement is used to modify data in a database table.

Update data in database

The UPDATE statement is used to update records that already exist in a database table.

grammar

 UPDATE table_nameSET column1=value, column2=value2,...WHERE some_column=some_value

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

To learn more about SQL, visit our SQL tutorials.

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:

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

 <?php$con=mysqli_connect("localhost","username","password","database");//Detect connection if (mysqli_connect_errno()){ echo "Connection failed: " . mysqli_connect_error();}mysqli_query( $con,"UPDATE Persons SET Age=36WHERE FirstName='Peter' AND LastName='Griffin'");mysqli_close($con);?>

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