Order data as in IN clause

Question

Hi,
Is there a way to order the result set to display in the same order as data supplied in IN clause
example:
select * from t_cu where cno IN (
220,
120,
900,
350,
99,
1,
34
);I would like to display the data in the same order as
220,
120,
900,
350,
99,
1,
34I know this can be done using UNION ALL, however if 50+ records are there in the IN clause, then it is quite a task.
Thanks

Answer 1

Example of one possible method..
SQL> ed
Wrote file afiedt.buf
  1  with req as (select '7844,7698,7782,7499' as en from dual)
  2      ,ord as (select REGEXP_SUBSTR (en, '[^,]+', 1, level) en, rownum rn
  3               from req
  4               connect by level <= length(regexp_replace(en,'[^,]*'))+1)
  5  --
  6  select emp.*
  7  from emp join ord on (emp.empno = ord.en)
  8* order by ord.rn
SQL> /
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
      7844 TURNER     SALESMAN        7698 08-SEP-81       1500          0         30
      7698 BLAKE      MANAGER         7839 01-MAY-81       2850                    30
      7782 CLARK      MANAGER         7839 09-JUN-81       2450                    10
      7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300         30
SQL>This takes a comma seperated string that specifies the required values in order, breaks that string up into individual values giving them an associated order number (rn) and then uses those values to restrict the main query and the order values to order the results.