MariaDB – Drop Database

MariaDB – Drop Database

Creation or deletion of databases in MariaDB requires privileges, typically, only given to root users or admins. Under these accounts, you have two options for deleting a database: the mysqladmin binary and a PHP script.

Note that deleted databases are irrecoverable, so exercise care in performing this operation. Furthermore, PHP scripts used for deletion do not prompt you with a confirmation before the deletion.

mysqladmin binary

The following example demonstrates how to use the mysqladmin binary to delete an existing database −

[root@host]# mysqladmin -u root -p drop PRODUCTS
Enter password:******
mysql> DROP PRODUCTS
ERROR 1008 (HY000): Can't drop database 'PRODUCTS'; database doesn't exist

PHP Drop Database Script

PHP employs the mysql_query function in deleting MariaDB databases. The function uses two parameters, one optional, and returns either a value of “true” when successful, or “false” when not.

Syntax

Review the following drop database script syntax −

bool mysql_query( sql, connection );

The description of the parameters is given below −

S.NoParameter & Description
1sql

This required parameter consists of the SQL query needed to perform the operation.

2connection

When not specified, this optional parameter uses the most recent connection used.

Try the following example code for deleting a database −

<html>
   <head>
      <title>Delete a MariaDB Database</title>
   </head>

   <body>
      <?php
         $dbhost = 'localhost:3036';
         $dbuser = 'root';
         $dbpass = 'rootpassword';
         $conn = mysql_connect($dbhost, $dbuser, $dbpass);
      
         if(! $conn ) {
            die('Could not connect: ' . mysql_error());
         }
         echo 'Connected successfully<br />';
         
         $sql = 'DROP DATABASE PRODUCTS';
         $retval = mysql_query( $sql, $conn );
         
         if(! $retval ){
            die('Could not delete database: ' . mysql_error());
         }

         echo "Database PRODUCTS deleted successfullyn";
         mysql_close($conn);
      ?>
   </body>
</html>

On successful deletion, you will see the following output −

mysql> Database PRODUCTS deleted successfully

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