SQL NUMBER 20

CAN NOT USE INNER JOIN LEFT JOIN OR RIGHT JOIN

18. Display all the columns in Assignment for those that have one or more rows in Hours. Your overall strategy must be a subquery connected by an N. 19. Display all the columns in Assignment for those that have one or more rows in Hours. Your overall strategy must be a subquery connected by an "EXISTS 03 20. Display all the columns in Assignment for those that have one or more rows in Hours. Your overall strategy must be a join Your solution can not contain any subqueries. Note that the sequence of the output rows for Query 18, 19, and 20 may be different, but the overall data values returned must be identical