Need to filter the data

Version of Oracle, Oracle Database 11g Express Edition Release 11.2.0.2.0 - Production

Hi gurus

I have the following data samples:

Examples of data

Select * from EMP;

As with a REFERENCE

(

Select EMPNO 10, 100 DEPTNO, 'A' DOUBLE Categ

Union of all the

Select EMPNO 11, 100 DEPTNO, 'B' DOUBLE

Union of all the

Select 12 EMPNO, 100 DEPTNO, the DOUBLE ' C'

Union of all the

Select EMPNO 21, 200 DEPTNO, would be "of the DOUBLE

Union of all the

Select EMPNO 22, 200 DEPTNO, the DOUBLE "E"

Union of all the

Select EMPNO 23, 200 DEPTNO, 'F' of the DOUBLE

)

Select * reference

order by 2;

The query result

EMPNO, DEPTNO, CATEG

10 100 A

11 100 B

12 100 C

21 200 D

22 200 E

23 200 F

Required result

EMPNO, DEPTNO, CATEG

10 100 A

11 100 B

12 100 C

21 200 D

Rules

I want to select all the data of deptno 100 but for deptno 200, I want only Categ = D...

Is it possible to get this result using a where clause. I also got the result with the union, but I don't want the Union. Thanks in advance...

Concerning

Shu

Can be

Select *.

reference

where (deptno<>200 or (deptno = 200 and categ = has '))

Tags: Database

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