Oracle: Checking NOT NULL in Tuples

Objective : To select records from Order table where (delivery_date, type) is NOT IN (NULL, 'A').

select * from Orders; 

 Table : Orders

 No     Type  Delivery_Date
  1      A      null
  2      B      20150120
  3      A      20150115
  4      A      20150115
  5      A      20150111
  6      A      20150112
  7      B      null
  8      B      null

Expected Result :

  No    Type  Delivery_Date

  2      B      20150120
  3      A      20150115
  4      A      20150115
  5      A      20150111
  6      A      20150112
  7      B      null
  8      B      null

Tried the below constraints in where clause but to no luck.

1. WHERE (DELIVERY_DATE, TYPE) IS NOT IN (NULL, 'A')
2. WHERE (NVL(DELIVERY_DATE, 0), TYPE) IS NOT IN (0, 'A')

To make it work, have added a column by name required_row which is set to Y if this condition is (deliver_date is null and type = 'A') and selecting only the records where required_row is Y.

with orders
as
  (select 1 as no, 'A' as type, null as delivery_date from dual union
   select 2 as no, 'B' as type, 20150120 as delivery_date from dual union
   select 3 as no, 'A' as type, 20150115 as delivery_date from dual union
   select 4 as no, 'A' as type, 20150115 as delivery_date from dual union
   select 5 as no, 'A' as type, 20150111 as delivery_date from dual union
   select 6 as no, 'A' as type, 20150112 as delivery_date from dual union
   select 7 as no, 'B' as type, null as delivery_date from dual union
   select 8 as no, 'B' as type, null as delivery_date from dual
  )
   select * from ( select orders.*,
   case when orders.delivery_date is null and type = 'A'
        then 'N' else 'Y'
        end as required_row from orders) where required_row='Y';

Any inputs/ thoughts on achieving the same in any other approach, keeping performance in view, would be appreciated.

Try this

select orders.* from orders where Delivery_Date is not null or type !='A'
 /*Assuming type as a char field and this query will output all records
             excluding deliverydate_null with type ='A' */

Modified the above query to include the sql snippet shared in fiddle.

Updated:

Here is Sample SQLFIDDLE