Get maximum Date valued records

Question

Hi,
I have a table like this
Table1 with columns SY,MID, EndDate, x,y,z
Here SY+MID+EndDate combination is Primary key.
I need to get all the lattest records (means max(enddate) for the given SY, MID.
Now I am writing like this:
Select t.SY,t.MID,t.Enddate,t.x,t.y,t.z
From Table t
Where Enddate=(select max(enddate) from table where sy=Paramsy and mid=paramMID)
Is there any way to get the desired result without writing the subquery.to get maximum enddate.
Thanks

Answer 1

EXPLAIN PLAN FOR
SELECT empno, ename, deptno
FROM emp
WHERE hiredate = (SELECT MAX(hiredate) FROM emp);
| Id  | Operation           | Name | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT    |      |     1 |    21 |     6   (0)| 00:00:01 |
|*  1 |  TABLE ACCESS FULL  | EMP  |     1 |    21 |     3   (0)| 00:00:01 |
|   2 |   SORT AGGREGATE    |      |     1 |     8 |            |          |
|   3 |    TABLE ACCESS FULL| EMP  |    14 |   112 |     3   (0)| 00:00:01 |
EXPLAIN PLAN FOR
select empno,ename,deptno,hiredate from
(select empno,ename,deptno,hiredate,dense_rank() over(order by hiredate desc) rn from emp)
where rn = 1;
| Id  | Operation                | Name | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT         |      |    14 |   770 |     4  (25)| 00:00:01 |
|*  1 |  VIEW                    |      |    14 |   770 |     4  (25)| 00:00:01 |
|*  2 |   WINDOW SORT PUSHED RANK|      |    14 |   294 |     4  (25)| 00:00:01 |
|   3 |    TABLE ACCESS FULL     | EMP  |    14 |   294 |     3   (0)| 00:00:01 |
CREATE INDEX ix_emp_hiredate
ON emp(hiredate)
TABLESPACE example;
exec dbms_stats.gather_schema_stats(USER, CASCADE=>TRUE);
EXPLAIN PLAN FOR
SELECT empno, ename, deptno
FROM emp
WHERE hiredate = (SELECT MAX(hiredate) FROM emp);
| Id  | Operation                    | Name            | Rows  | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT             |                 |     1 |    21 |     5   (0)| 00:00:01 |
|   1 |  TABLE ACCESS BY INDEX ROWID | EMP             |     1 |    21 |     2   (0)| 00:00:01 |
|*  2 |   INDEX RANGE SCAN           | IX_EMP_HIREDATE |     1 |       |     1   (0)| 00:00:01 |
|   3 |    SORT AGGREGATE            |                 |     1 |     8 |            |          |
|   4 |     INDEX FULL SCAN (MIN/MAX)| IX_EMP_HIREDATE |    14 |   112 |            |          |
------------------------------------------------------------------------------------------------Just for comparison.