"Oracle SQL - WHERE 子句中的 CASE"

Question

I want to create case statement in order to ovoid using OR but I have the error below

SELECT
    *
FROM
    crtdat_tt d,
    itspos    l
WHERE
    l.comar = d.comar
   and (CASE WHEN d.datra = l.dahis THEN L.DAHIS=D.DAPRV
               ELSE  d.datra = l.dahis
            END) ; 

Answer 1

Something like this?

select *
from crtdat_tt d join itspos l on l.comar = d.comar
where l.dahis = case when d.datra = l.dahis then d.daprv
                     else d.datra
                end;