What is the best data type for a field that stores mobile numbers?

A. MySQL

B. MongoDB

C. PostgreSQL

D. Oracle

A. Deletes all rows from a table without logging individual row deletions

B. Deletes only duplicate records

C. Removes table structure

D. Backs up the table

A. GROUP BY

B. ORDER BY

C. HAVING

D. WHERE

A. ORDER BY

B. GROUP BY

C. HAVING

D. FILTER

A. DISTINCT

B. UNIQUE

C. REMOVE

D. EXCLUDE