SQL

how to find 2nd highest salary in a table

-- creating Employee table in Oracle
CREATE TABLE Employee (name varchar(10), salary int);

-- inserting sample data into Employee table
INSERT INTO Employee VALUES ('Rick', 3000);
INSERT INTO Employee VALUES ('John', 4000);
INSERT INTO Employee VALUES ('Shane', 3000);
INSERT INTO Employee VALUES ('Peter', 5000);
INSERT INTO Employee VALUES ('Jackob', 7000);

SELECT TOP 1 salary 
FROM (
  SELECT DISTINCT TOP 2 salary FROM Employee ORDER BY salary DESC 
  ) AS temp 
ORDER BY salary