How can i solve the query...?

[Jayanoracle]

Emp Dept
=== ======
Ename - DeptNo
Eno - DName
DeptNo - Location

Count the number of employees in each department and get the department which has least number of employees


If a table has one column named as 'X' type integer
it contains 3,5,10,-2,15,41,2 and so on

If we a number (i.e., that given number is in the above list) as input, get the immediate biggest number for that given one. (Query only not PL/SQL script)

[abhaysk]

Select 
  Dept.Dname, A.Cnt
From 
  ( Select Dept_No, Count(*) Cnt From Emp Group By Dept_No Order By 2) A,
  Dept
Where
  A.Dept_No = Dept.Dept_No And
  Rownum < 2
;

[tamilselvan]

For the 2nd Qn,

select min(x) from table_a where x > :b1;

where b1 is your input value.

Tamil