MariaDB Delete Database

Definition on MariaDB Delete Database

• MariaDB Delete Database is a MariaDB administrative command which removes the specific database mentioned in the query with all its related tables and procedures too.
• But for either creating or deleting any databases in the server MariaDB, a user needs certain privileges normally associated with the admins or the root users. Here, these two accounts comprise of two options to allow removing a database – the first is a PHP script and the other is the mysqladmin binary.
• A user should be careful while using this command MariaDB Delete Database for performing some operations because once the command gets executed then the removed databases are irretrievable, so exercise properly.

Syntax:

You can observe a simple elementary syntax structure code provided as below:

DROP (DATABASE | SCHEMA) {IF EXISTS} Name_of_database

Let us describe the above syntax terms used:

• DROP DATABASE works to drop all the available tables in the server database and then deletes the database. But to use this command a user requires the DROP privilege on the MariaDB database. Also, DROP SCHEMA functions as a synonym for the MariaDB DROP DATABASE command for deleting the database.
• But it should be noted that if a database is dropped, then the user privileges available on the database server will not be deleted.
• The next term i.e. IF EXISTS term is responsible to avoid an error from delivering after query execution for the databases which may not be currently available. Therefore, further, the MariaDB generates a NOTE for every non-existing database if the term IF EXISTS is implemented.

How to Delete Database in MariaDB using various ways?

A user can perform the delete operation or even the create operation on any MariaDB databases if the user holds the admin privileges or the root ones. These two accounts include two choices to delete a database in MariaDB – one is the mysqladmin binary and the other is a PHP script.

Once the databases are deleted in MariaDB we cannot recover them so if not sure take a backup if required for these databases or be careful while accomplishing this admin-level operation.

Let us view the two concepts of accounts in MariaDB:

Mysqladmin binary

The succeeding example illustrates how to implement the mysqladmin binary to remove an existent MariaDB database using the command below:

Firstly, you need to login to your phpmyadmin or through command and type the Delete operation query as Drop Database technology;

Remember that if the mentioned name of the database does not exist then it will reflect the error as ERROR 1008 (HY000): Can’t drop database ‘technology’; database doesn’t exist;

PHP Drop Database Script

The mysql_query function is employed by PHP for deleting the MariaDB databases. Here, the mysql_query function implements the two parameters where one is optional and will return the value as TURE or FLASE, true if the query executes and false is not.

View the following syntax for drop database script as Bool mysql_query(sql, connection);

The parameters used are described as below:

• SQL is the required parameter including the SQL query necessary to perform the operation.
• Connection is the optional parameter in the function which when not particularized applies the latest connection established.

Examples

For instances, let us discuss some of the MariaDB Delete Database queries explained as follows:

Drop Database Trainers;

Output:

After the query execution, you can view that the MariaDB database will be removed. But again if you try to run the same command in the server you will receive an error as follows:

Drop Database Trainers;

Output:

Here, you can see that the query executed again as previous will produce an ERROR 1008 (HY000) which defines that the Drop command cannot be performed as the database with this name has been already deleted so now it will display that that same database does not exist in the MariaDB server to perform the deletion.

You can also activate a warning to see what kind of error has been occurred in the query execution by using the succeeding command:

SHOW WARNINGS ENABLED

Further to avoid the database existent error you can use the SQL keyword as IF EXISTS to support the query and define that execute the query or perform deletion only if the specific MariaDB database is present otherwise not. So, this kind of concept will work better for standard operations. Using this will avid seeing any error.

The command can be typed as:

Drop Database IF EXISTS trainers;

Output:

You should remember that this code 1008 denotes the error for not dropping the database because it is not available. Before proceeding towards the deletion operation a user can view all the existing databases present by using the command as:

SHOW DATABASES;

Output:

As you can see the databases present are shown in the list.

Note that if the MariaDB database is removed using the command line tool directly then you should be careful to delete the specific one because once the wrong one is removed then it is difficult to go back and perform a backup. For MariaDB Delete database operation, the mysql-console may not be supportive here. But when everything performs well, then it will produce a simple message as ‘OK’.

After the delete operation, you can re-check the server if the database is deleted or not by using the same query as SHOW DATABASES.

Similarly, deleting a database in such an acquainted graphical interface as cpanel in hosting platforms can be also simple including some options and visiting the wizard panel items in the cPanel server.

Conclusion

• The MariaDB Delete Database query command can be defined as humble as executing any single command.
• This operation to remove the specific database is a non-reversible event and must be performed with caution. A user should know and ensure that the wrong MariaDB database is not removed from the server since then it cannot be recovered again.
• Therefore, it is often a better idea to perform create backup operation of the database to reserve the old database to use if required in the future of that particular database.

Recommended Articles

This is a guide to the MariaDB Delete Database. Here we discuss the Definition, How to Delete Database in MariaDB using various ways?. You may also have a look at the following articles to learn more –

1. MariaDB AUTO_INCREMENT
2. MariaDB MaxScale
3. MariaDB Foreign Key
4. MariaDB Grant All Privileges