What are the different DDL commands in SQL? Give a description of their purpose.
Ask The Science Latest Questions
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 the difference between SQL and T-SQL?
What is the purpose of the BETWEEN keyword?
What is the difference between SQL and PL/SQL?
What is a unique constraint? How is it different from a primary key?