Reg: Creation of a View

Question

Hi All,
I have a requirement like creating a view with deptno and employee information like below. How to create a view to get the result set in the below fromat.
DEPTNO   EMPNO   ENAME    JOB
10             7788        SMITH      CLERK
                7369        JAMES     MANAGER
                7123        CLARK     CLERK
20            1234         ABCD       SALESMAN
Thanks,

Answer 1

971220 wrote:
Hi All,
I have a requirement like creating a view with deptno and employee information like below. How to create a view to get the result set in the below fromat.
DEPTNO   EMPNO   ENAME    JOB
10             7788        SMITH      CLERK
                7369        JAMES     MANAGER
                7123        CLARK     CLERK
20            1234         ABCD       SALESMAN
Thanks,
Hi ,
Try this
{code}
SQL> with test_data as
  2  (
  3  select 10 dept_no,7798 emp_no,'SMITH' ENAME,'CLERK' AS JOB
  4  from dual
  5  UNION ALL
  6  SELECT 10,7769,'JAMES','MANAGER' FROM dual
  7  UNION ALL
  8  SELECT 10,7123,'CLARK','CLERK' from dual UNION ALL
  9  SELECT 20,1234,'ABCD','SALESMAN' from dual
10  )
11  select  (case when rn=1 then dept_no END) AS dept_no,emp_no,ename,job
12  from (
13  select dept_no,
14  emp_no,
15  ename,
16  job,
17  row_number() over (partition by dept_no ORDER BY emp_no) rn  from test_data)
18 
SQL> .
SQL> /
{code}
Output:
{code}
SQL> /
   DEPT_NO     EMP_NO ENAME JOB
        10       7123 CLARK CLERK
                 7769 JAMES MANAGER
                 7798 SMITH CLERK
        20       1234 ABCD  SALESMAN
SQL>
{code}
Create view on top of the above query
{code}
CREATE view test_vw as ...above select query
{code}
Hope this helps
Regards,
Achyut Kotekal