Examples: SELECT Statements with a Correlated Subquery - Teradata Database - Teradata Vantage NewSQL Engine

Use a correlated subquery to return the names of the employees with the highest salary in each department.

     SELECT name
     FROM personnel p
     WHERE salary = (SELECT MAX(salary)
                     FROM personnel sp
                     WHERE p.department=sp.department);

Use a correlated subquery to return the names of publishers without books in the library.

     SELECT pubname
     FROM publisher
     WHERE 0 = (SELECT COUNT(*)
                FROM book
                WHERE book.pubnum=publisher.pubnum);