Discussion
What SQL command can be used to delete columns from a table?
Answer: C
Correct answer: ALTER TABLE TableName DROP COLUMN ColumnName
Structural changes to an existing table are made with ALTER TABLE, not MODIFY TABLE, which is not an SQL command at all. For removing a column the keyword COLUMN is required. Note the asymmetry with adding a column, where most implementations accept ADD without it - an inconsistency in the language rather than in the question.
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