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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

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.

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It changes the data type of a column

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