Single Row Subquery « Query Select « Oracle PL/SQL Tutorial

2.36.Single Row Subquery
2.36.1.Writing Single Row Subqueries
2.36.2.Show products that are more expensive than average
2.36.3.Using Single Row Operators
2.36.4.Subqueries in a HAVING Clause
2.36.5.Subqueries in a FROM Clause (Inline Views)
2.36.6.A Couple of Errors when using subqueries in a FROM Clause (Inline Views)
2.36.7.Subqueries May Not Contain an ORDER BY Clause
2.36.8.A query that returns a result based on 'other rows'
2.36.9.Use greater than in sub query( list all employees who is younger than No 7)

2.36.10.Return null from subquery
2.36.11.Not Equal subquery
2.36.12.Not IN subquery
2.36.13.Older than another employee
2.36.14.Earn more than any managers
2.36.15.Earn more money than all managers
2.36.16.Earn more than average
2.36.17.List all employees who are younger than Jane
2.36.18.Subqueries in the WHERE Clause: equals
2.36.19.Subqueries in the WHERE Clause: less than

2.36.20.Find all employees who are younger than employee whose id is 9999