Which SQL command is used to modify the structure of an existing table? MCQ with Answer and Explanation

Explanation:
DBMS generally involves higher initial costs and complexity compared to simple file systems, though it offers better control over redundancy, independence, and security.

Explanation:
A subquery is a SELECT statement nested within another SQL statement (e.g., SELECT, INSERT, UPDATE, DELETE).

Explanation:
The FROM clause identifies the table(s) from which data is to be selected.