Which statement can be used for modifying the definition for an existing table?

Solution(By Examveda Team)

ALTER: The ALTER statement in SQL is used to modify the structure or definition of an existing database object, including tables. With the ALTER TABLE statement, you can add, modify, or drop columns, constraints, or indexes, among other modifications to the table's structure.
Modified: This option is incorrect. "Modified" is not a specific SQL statement for altering the definition of an existing table. The correct term is ALTER.
SELECT: The SELECT statement is used to retrieve data from a database. It is not used for modifying the structure of a table.
FROM: The FROM keyword is used in conjunction with the SELECT statement to specify the table or tables from which data is retrieved. It is not used for modifying table definitions.

Therefore, the statement used for modifying the definition of an existing table is Option A: ALTER.