decode in group by expression

[drozd001]

Hello.

I have the following query:

select decode($P{model},-1,'ALL',$P{model}) from models

...

rest of query

...

group by decode($P{model},-1,'ALL',$P{model}) 

This query returns me 00979 ORA Error. How can I fix this?

[santosh.audi19]

Few of them faced Issues while using Decode.
Using Case definitely works, once try using CASE instead of decode.

Hope this helps.
Thanks.

[drozd001]

Ill try using CASE instead of DECODE and ill write it is helpful.