PHP MySQL Update
UPDATE statement is used to modify the data in a database table.
Data updated in the database
UPDATE statement to update the database tables already exist in the record.
grammar
UPDATE table_name SET column1=value, column2=value2,... WHERE some_column=some_value
Note: Please note that the WHERE clause in the UPDATE syntax.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 knowledge, please visit our SQL tutorial .
To get PHP to execute the statement above we must use mysqli_query () function. This function is used to send a query or command MySQL connection.
Examples
In the previous section of this tutorial, we have created a directory named "Persons" table, as follows:
FirstName | LastName | Age |
---|---|---|
Peter | Griffin | 35 |
Glenn | Quagmire | 33 |
The following example updates "Persons" some of the data 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='Peter' AND LastName='Griffin'"); mysqli_close($con); ?>
After this update, "Persons" table is as follows:
FirstName | LastName | Age |
---|---|---|
Peter | Griffin | 36 |
Glenn | Quagmire | 33 |