PHP MySQL Delete

In this tutorial you’ll learn how to delete records from a MySQL table using PHP.

## Deleting Database Table Data

Just as you insert records into tables, you can delete records from a table using the SQL [DELETE](http://www.bixiaguangnian.com/manual/sql/3401.html "DELETE") statement. It is typically used in conjugation with the WHERE clause to delete only those records that matches specific criteria or condition.

The basic syntax of the DELETE statement can be given with:

```mysql
DELETE FROM table_name WHERE column_name=some_value
```

Let's make a SQL query using the DELETE statement and WHERE clause, after that we will execute this query through passing it to the PHP mysqli\_query() function to delete the tables records. Consider the following persons table inside the demo database:

The PHP code in the following example will delete the records of those persons from the persons table whose first\_name is equal to John.

```php
<?php
/* Attempt MySQL server connection. Assuming you are running MySQL
server with default setting (user 'root' with no password) */
$link = mysqli_connect("localhost", "root", "", "demo");

// Check connection
if($link === false){
    die("ERROR: Could not connect. " . mysqli_connect_error());
}

// Attempt delete query execution
$sql = "DELETE FROM persons WHERE first_name='John'";
if(mysqli_query($link, $sql)){
    echo "Records were deleted successfully.";
} else{
    echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}

// Close connection
mysqli_close($link);
?>
```

After the deletion the persons table will look something like this:

As you can see the records has been deleted successfully from the persons table.

> Warning: The WHERE clause in the DELETE statement specifies which record or records should be deleted. If you omit the WHERE clause, all records will be deleted.

Last modification：September 14, 2024