How to find a data with the minimum value I get without using sub query

Currently, I manage to get a record by using subquery to find the minimum number, eg:
SELECT TAccTrn.ASysCde
FROM TAccTrn
WHERE TAccTrn.AAccTrnNum=(SELECT Min(TAccTrn.AAccTrnNum)
FROM TAccTrn, TDbtSchCltDtl
WHERE TDbtSchCltDtl.ASrcRefId=TAccTrn.ASrcRefId
AND TDbtSchCltDtl.ASrcRefSubId=TAccTrn.ASrcRefSubId
AND TDbtSchCltDtl.ASrcRefSeq=TAccTrn.ASrcRefSeq)
Is there any more idea without using the subquery?

Hi ,
What about using an in-line view and the row_number () analytic function...????
Here is an example....
SQL> select * from emp;
EMPNO ENAME      JOB         MGR HIREDATE          SAL      COMM DEPTNO
7369 SMITH      CLERK      7902 18/12/1980     800,00               20
7499 ALLEN      SALESMAN   7698 20/02/1981    1600,00    300,00     30
7521 WARD       SALESMAN   7698 22/02/1981    1250,00    500,00     30
7566 JONES      MANAGER    7839 02/04/1981    2975,00               20
7654 MARTIN     SALESMAN   7698 28/09/1981    1250,00   1400,00     30
7698 BLAKE      MANAGER    7839 01/05/1981    2850,00               30
7782 CLARK      MANAGER    7839 09/06/1981    2450,00               10
7788 SCOTT      ANALYST    7566 18/04/1987    3000,00               20
7839 KING       PRESIDENT       17/11/1981    5000,00               10
7844 TURNER     SALESMAN   7698 08/09/1981    1500,00      0,00     30
7876 ADAMS      CLERK      7788 21/05/1987    1100,00               20
7900 JAMES      CLERK      7698 03/12/1981     950,00               30
7902 FORD       ANALYST    7566 03/12/1981    3000,00               20
7934 MILLER     CLERK      7782 23/01/1982    1300,00               10
14 rows selectedUsing a solution like the one you don't want ...(a subquery) i would write....
SQL> select ename from emp
2    where hiredate=(select min(hiredate) from emp)
3 /
ENAME
SMITHWhereas , using an in-line view....
SQL> select ename from
2   (
3    select ename,row_number() over(order by hiredate asc) row_num from emp
4    )
5 where row_num=1
6 /
ENAME
SMITHIs it acceptable...????
Regards,
Simon

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