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The video tutorial explains how to use the SQL ALTER TABLE statement to modify existing tables by adding or deleting columns. It demonstrates entering a database, displaying records, adding a new column named 'age', and then removing it. The tutorial concludes with a summary of the ALTER TABLE operations performed.

What is the purpose of the ALTER TABLE statement in SQL?

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Describe the steps to add a new column to an existing table.

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What command would you use to remove a column from a table?

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Explain what happens to the data when a column is dropped from a table.

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How can you verify that a column has been successfully added or removed from a table?

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