Query to find Highest Salary

Question

Hi,
What is the SQL query to find the 1st highest salary.
2nd Highest salary in the emp table.
likewise nth highest salary employee records.
Can anyone please give me the queries for the above scenarios.
Thanks

Answer 1

There are many nethods, some examples
Using group function:
SQL> l
  1  SELECT ename,sal FROM emp e1
  2  WHERE &val >= (SELECT COUNT(*) FROM emp e2
  3*               WHERE e1.sal<=e2.sal)
SQL> /
Enter value for val: 1
old   2: WHERE &val >= (SELECT COUNT(*) FROM emp e2
new   2: WHERE 1 >= (SELECT COUNT(*) FROM emp e2
ENAME                                      SAL
KING                                      5000Using in-line view and rownum:
SQL> ed
Wrote file afiedt.buf
  1  SELECT * FROM (SELECT ename,sal FROM emp ORDER BY SAL desc)
  2* WHERE rownum<2
SQL> /
ENAME                                      SAL
KING                                      5000Using analytical function ROW_NUMBER
SQL> ed
Wrote file afiedt.buf
  1  SELECT * FROM (SELECT ename,sal,ROW_NUMBER() OVER(ORDER BY sal desc) rn FROM emp )
  2* WHERE rn=1
SQL> /
ENAME                                      SAL         RN
KING                                      5000          1Also you can use several other analytical functions as mentioned by Kartick. Search and read on the internet to find what is most suitable way and why!.
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:2853107469873
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:12759079666984