select 
    "EMP_CODE"
    ,"EMP_NAME"
    ,"SEX"
    ,"BIRTHDAY"
from
    "TBL_EMPLOYEES" 
where
    ("EMP_CODE" <= 4
OR
    "SEX" = "M")
AND
    "BIRTHDAY" BETWEEN '1981-01-01' and '1981-12-31'
;