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SQL Interview Preparation—Intermediate Level

Answer: Deleting a Database

Explore the process of deleting a database using the DROP DATABASE command while understanding important precautions. Learn to verify available databases with SHOW DATABASES and consider alternatives like archiving, renaming, or managing permissions. This lesson teaches essential SQL commands and strategies to handle database deletion securely and efficiently.

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Solution

The solution is given below:

MySQL
-- The query to delete a database
DROP DATABASE IF EXISTS PastInnovations;
-- Retrieve the list of databases
SHOW DATABASES;

Code explanation

The explanation of the solution code is given below:

  • Line 2: The DROP DATABASE statement deletes the database named PastInnovations along with all its tables and data.

  • Line 4: The SHOW DATABASES command displays a list of all databases to confirm which databases are still available.

Recalling relevant concepts

We have covered the following concepts in this question:

  • The DROP DATABASE statement

  • Checking for available databases

Let’s discuss the concepts used in the solution:

  • We use the DROP DATABASE command followed by the desired database name to delete a database. 

DROP DATABASE DatabaseName;

  • We use the SHOW DATABASES command to list the names of all the available databases.

SHOW DATABASES;

Alternate solutions

Let’s discuss the alternate solutions for the same problem in this section: ...