Data Engineering Associate with Databricks Practice Exam

How do you drop all tables in a database using SQL?

1. DELETE ALL FROM DATABASE name;

2. DROP ALL TABLES IN DATABASE name;

3. DROP DATABASE name CASCADE;

4. REMOVE DATABASE name COMPLETE;

The correct answer is: DROP DATABASE name CASCADE;

The choice that accurately describes how to drop all tables in a database is to use the command that removes the entire database, which inherently includes all of its tables. The command "DROP DATABASE name CASCADE" effectively accomplishes this by deleting the database and all of its contents, including all associated tables and other objects within that database. This method is efficient and straightforward, especially in scenarios where you need to clean up a database entirely. The CASCADE option is particularly important because it ensures that all dependent objects (like tables, views, and functions) are dropped along with the database itself, preventing any issues related to dependencies. The other commands do not correctly execute the intended action. For instance, using a command that suggests deleting entries from a database or removing a database without cascading effects would not accomplish the goal of dropping all tables effectively. Therefore, the command that specifies the removal of the database is the correct approach to remove all tables along with other objects contained within.