在oracle sql中按多列分组后匹配行

如何在具有多个列的group by之后查询OWS

下表如下：

ord_num | loc | void | pay_type
-----------------------
10   |   a101  | Y   | CR
10   |   a101  | N   | AB
10   |   a101  | N   | CH
11   |   a102  | N   | CR
11   |   a102  | Y   | CR
12   |   a103  | Y   | JK
13   |   a104  | N   | CR
13   |   a104  | Y   | JK
14   |   a104  | Y   | CR

我需要带有ord_num、loc的行，其中pay_类型仅包含“CR”

我期待下面的查询结果：

ord_num | loc
------------------
11   |   a102
14   |   a104

select distinct ord_ num, loc
from yourTable 
where pay_type = 'CR'

select ord_num, loc
from table
group by ord_num, loc
having max(pay_type) = min(pay_type) and max(pay_type) = 'CR'