Transactions between Min and Max dates

Question

Hey all,
I have a requirement to extract data between min(transdate) and max(transdate), i got to do this using a single query, i used two queries, ie. 1 select for selecting the max and min dates and my second query to get the transactions. Can some one give me an idea to solve this, as Max & Min functions are not allowed in the where clause.
Thanks in Advance
- Eric

Answer 1

Why single fetch if you want effeciency then use analytic function
SQL> SELECT empno,ename,hiredate FROM
  2  (SELECT empno,ename,hiredate,MAX(hiredate) OVER (ORDER BY empno) m,
  3          MIN(hiredate) OVER (ORDER BY empno) mi FROM emp)
  4  WHERE hiredate BETWEEN mi AND m;The least and greatest function returns the smallest and greatest value in a list of expressions.
The syntax for the least function is:
least( expr1, expr2, ... )
Khurram