Cassandra Practice Test

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Prepare for the Cassandra certification. Use flashcards, multiple-choice questions with explanations to help you master the subject. Gear up for your Cassandra exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What action does the command "ALTER TABLE table1 DROP col1" perform?

It adds a new column to the table
It renames a column in the table
It removes a column from the table
It changes the data type of a column

The correct answer is: It removes a column from the table

The command "ALTER TABLE table1 DROP col1" is used to remove a specified column, in this case, "col1," from the table named "table1." This action permanently deletes the column and all its associated data from the table structure. In Cassandra, unlike some other database systems, dropping a column is a straightforward operation that directly impacts the schema of the table, allowing for modifications to the structure as needed based on the evolving requirements of data management. This command is fundamental for managing database schemas, enabling users to optimize their tables by eliminating unnecessary or redundant columns, which can lead to improved performance and easier maintenance.