If a table contains duplicate rows, will a query display duplicate values by default? How can you eliminate duplicate rows from a query result?

What is a primary key?

What is the difference between SQL and PL/SQL?

What are the different DML commands in SQL? Give a description of their purpose.

What is a unique constraint? How is it different from a primary key?

What is a synonym?

What is a surrogate key?

What is the difference between SQL and T-SQL?

What is the purpose of the IN keyword?

What is a composite key?