ALIAS 在 where 子句中不起作用

Question

我有包含大字符串的列 RESPONSE_XML and REQUEST_XML。为了从 RESPONSE_XML 获取 SUBSCRIPTION_ID 和从 REQUEST_XML 获取 orderType，我对这个大字符串使用了 substring 函数。查询工作正常。但是现在我想为这个查询设置条件，这样它应该只 return SUBSCRIPTION_ID where orderType='NEW'。我将 Substring 的结果都存储到别名中，并在 where 条件下使用这些别名。但它不起作用并给出错误 ORA-01722 Invalid numnber。这是我的查询：

    SELECT REPLACE(REPLACE(REGEXP_SUBSTR(RESPONSE_XML, '<ax2147:subscriptions xsi:type="ax2127:SubscriptionDTO"><ax2130:id>\d+</ax2130:id>'), 
    '<ax2147:subscriptions xsi:type="ax2127:SubscriptionDTO"><ax2130:id>', ''), '</ax2130:id>', '') 
    AS SUBSCRIPTION_ID , 
    REPLACE(REPLACE(REGEXP_SUBSTR(REQUEST_XML, '<ns7:orderType>\d+</ns7:orderType>'), '<ns7:orderType>', ''), '</ns7:orderType>', '') 
    AS order_type
    FROM
    SOAP_MONITORING 
    where WEB_SERVICE_NAME='RatorWebShopService' and WEB_METHOD_NAME='placeShopOrder' 
and order_type='NEW' order by CREATE_DATE desc

我也尝试过以这种方式进行查询，但结果出错，即第 10 行的 ORA-00932 数据类型不一致

SELECT REPLACE(REPLACE(REGEXP_SUBSTR(RESPONSE_XML, '<ax2147:subscriptions xsi:type="ax2127:SubscriptionDTO"><ax2130:id>\d+</ax2130:id>'), 
'<ax2147:subscriptions xsi:type="ax2127:SubscriptionDTO"><ax2130:id>', ''), '</ax2130:id>', '') 
AS SUBSCRIPTION_ID from SOAP_MONITORING 
where 
REQUEST_XML
in
(
REPLACE(REPLACE(REGEXP_SUBSTR(REQUEST_XML, '<ns7:orderType>\d+</ns7:orderType>'), '<ns7:orderType>', ''), '</ns7:orderType>', '') 
)
and WEB_SERVICE_NAME='RatorWebShopService' and WEB_METHOD_NAME='placeShopOrder' and REQUEST_XML='NEW'

Answer 1

为了在列别名上做谓词 (WHERE)，您可以使用 内联视图（也称为子查询，尽管子查询实际上更常用于不同的事情）或常见的 table 表达式（也称为 CTE 或 "with" 子句）。

内联视图你可以这样做：

select iw.order_type
from (
   SELECT REPLACE(REPLACE(REGEXP_SUBSTR(RESPONSE_XML, '<ax2147:subscriptions xsi:type="ax2127:SubscriptionDTO"><ax2130:id>\d+</ax2130:id>'), 
   '<ax2147:subscriptions xsi:type="ax2127:SubscriptionDTO"><ax2130:id>', ''), '</ax2130:id>', '') 
   AS SUBSCRIPTION_ID , 
   REPLACE(REPLACE(REGEXP_SUBSTR(REQUEST_XML, '<ns7:orderType>\d+</ns7:orderType>'), '<ns7:orderType>', ''), '</ns7:orderType>', '') 
   AS order_type,
   CREATE_DATE
   FROM
   SOAP_MONITORING 
   where WEB_SERVICE_NAME='RatorWebShopService' and WEB_METHOD_NAME='placeShopOrder' 
) iw
where iw.order_type='NEW'
order by iw.CREATE_DATE desc

常见的table表达式你可以这样做：

with cte as (
   SELECT REPLACE(REPLACE(REGEXP_SUBSTR(RESPONSE_XML, '<ax2147:subscriptions xsi:type="ax2127:SubscriptionDTO"><ax2130:id>\d+</ax2130:id>'), 
   '<ax2147:subscriptions xsi:type="ax2127:SubscriptionDTO"><ax2130:id>', ''), '</ax2130:id>', '') 
   AS SUBSCRIPTION_ID , 
   REPLACE(REPLACE(REGEXP_SUBSTR(REQUEST_XML, '<ns7:orderType>\d+</ns7:orderType>'), '<ns7:orderType>', ''), '</ns7:orderType>', '') 
   AS order_type,
   CREATE_DATE
   FROM
   SOAP_MONITORING 
   where WEB_SERVICE_NAME='RatorWebShopService' and WEB_METHOD_NAME='placeShopOrder' 
)
select cte.order_type
from cte
where cte.order_type='NEW'
order by cte.CREATE_DATE desc

ALIAS 在 where 子句中不起作用

ALIAS in where clause not working

sql

oracle

substring

alias

where-clause