How to create a view?

Hi all

11.2.0.1

I have tables EMP and DEP, and their structures are the ff:

DEP (depno, depname)
EMP (emp_id, depno)

I want to create a view EMP_VIEW (emp_id, status).

The status value is "Active" (if depno exists in DEP) or 'Inactive' (if depno is null or not depno corresponding to the DEP).

How to create this view?

Thank you very much

zxy

Check this box

SQL> insert into emp(empno,ename) values (1234,'test');

1 row created.

SQL> commit;

Commit complete.

SQL> create or replace view emp_view as  select e.empno, nvl2( d.deptno,'Active','Inactive') Status from emp e left outer join dept d on e.deptno=d.deptno;

View created.

SQL> select * from emp_view;

     EMPNO STATUS
---------- --------
      7369 Active
      7499 Active
      7521 Active
      7566 Active
      7654 Active
      7698 Active
      7782 Active
      7788 Active
      7839 Active
      7844 Active
      7876 Active
      7900 Active
      7902 Active
      7934 Active
      1234 Inactive

15 rows selected.

Tags: Database

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addition of {noformat}

{noformat} tags for readability

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