How do I drop multiple databases in MySQL?

 To drop multiple databases in MySQL, you can use a combination of SQL queries to drop each database one by one. Here's how you can do it:

1. Log into MySQL: Open your terminal or MySQL command line client and log into MySQL with the following command:

   mysql -u root -p
   

   Enter your MySQL root password when prompted.

2. Drop the databases: You can drop multiple databases by running the DROP DATABASE command for each one. If you want to drop, say, db1, db2, and db3, you would execute:

   DROP DATABASE IF EXISTS db1;
   DROP DATABASE IF EXISTS db2;
   DROP DATABASE IF EXISTS db3;
   

   This will check if each database exists and then drop it if it does.

3. Alternative method (using a script): If you have many databases to drop, you can create a script that iterates through the database names and drops them. For example:

   SET @databases = 'db1,db2,db3';  -- list all databases to drop
   SET @sql = CONCAT('DROP DATABASE IF EXISTS ', REPLACE(@databases, ',', ' DROP DATABASE IF EXISTS '));
   PREPARE stmt FROM @sql;
   EXECUTE stmt;
   DEALLOCATE PREPARE stmt;
   

   This will dynamically create and execute the SQL statement for each database.

4. Confirm the databases were dropped: After running the above commands, you can check if the databases have been dropped by running:

   SHOW DATABASES;
   

   The dropped databases should no longer appear in the list.

Important Note: Be very careful when dropping databases, as this operation is irreversible and will delete all data in those databases.

Let me know if you need more details or if something’s unclear!