text: //176	Second Highest Salary
  CREATE TABLE Test (id int, Salary int);
  
  INSERT INTO Test VALUES(1, 100)
  INSERT INTO Test VALUES(2, 200)
  INSERT INTO Test VALUES(3, 300)
  
  SELECT max(Salary)
  FROM Employee
  WHERE Salary <> (
  SELECT max(Salary)
  FROM Employee)
  
  
  /*
  select (
    select distinct Salary from Employee order by Salary Desc limit 1 offset 1
  )as second
  */