Removing a Table and its Data in a Relational Database | Exam Answer

Remove Table and Data Command

Question

A database administrator finds that a table is not needed in a relational database.

Which of the following commands is used to completely remove the table and its data?

Answers

Explanations

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A. B. C. D.

D.

The correct answer is D. DROP.

The DROP command is used to completely remove a table and its data from a relational database. It is important to note that the DROP command is a permanent action, and it cannot be undone. Therefore, it is recommended to create a backup of the database before dropping any table.

Here is an example of the syntax used to drop a table named "employees" in SQL:

sql
DROP TABLE employees;

The above command will remove the "employees" table and all its data from the database.

To explain the other options listed:

  • UPDATE command is used to modify existing data in a table, not remove a table and its data.
  • DELETE command is used to remove specific rows of data from a table, not remove the entire table.
  • ALTER command is used to modify the structure of an existing table, not remove a table and its data.