IF/ELSE in WHERE statement in ORACLE

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Hello,

I am trying to apply IF/ELSE or CASE/WHEN to my select statement but I am not successful. Can someone help me how to write this?

My query is:

SQL

SELECT P.*
FROM PTABLE P, MTABLE M, NTABLE N
WHERE 
    CASE 
       WHEN P.MATERIAL IS NOT NULL THEN M.MATERIAL = N.MATERIAL
       WHEN P.MATERIAL IS NULL THEN M.MATERIAL = P.MATERIAL
    END

I tried that but I get error on that query. As an alternative I tried appliying if else but no good.
So my statement should be something like

SQL

IF P.MATERIAL IS NOT NULL THEN
M.MATERIAL = N.MATERIAL 
ELSE 
M.MATERIAL = P.MATERIAL

Thanks in advance

Posted 5-May-13 20:22pm

wonder-FOOL

Updated 5-May-13 20:28pm

v2

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2 solutions

Solution 2

Hi...

Use this Query with Decode function

SELECT P.*
FROM PTABLE P,MTABLE M,NTABLE R
WHERE P.MATERIALID = M.MATERIALID
  AND P.MATERIALID = N.MATERIALID
  AND P.MATERIAL = DEOCDE(P.MATERIAL,NULL,P.MATERIAL,N.MATERIAL)

If you have any clarification,please don't hesitate to contact me. Thank you.

Posted 6-May-13 0:49am

Member 10024564

Updated 6-May-13 0:52am

v2

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Aarti Meswania · Accepted Answer · 2013-05-05T20:31:00

Solution 1

Try This,

SQL

SELECT P.*
FROM PTABLE P
LEFT JOIN MTABLE M ON P.MATERIALID = M.MATERIALID
LEFT JOIN NTABLE R ON P.MATERIALID = N.MATERIALID
WHERE
    M.MATERIAL = CASE WHEN P.MATERIAL IS NOT NULL THEN N.MATERIAL ELSE P.MATERIAL END

Happy Coding!
:)

Posted 5-May-13 20:31pm

Aarti Meswania

Comments

wonder-FOOL 6-May-13 2:38am

Thank you sir.

Aarti Meswania 6-May-13 2:42am

I am Girl not sir
Welcome!
Glad to help you! :)