我如何循环查询？

我在Oracle中有以下sql查询。我如何循环查询？

SELECT pr.uuid AS masterproductid, 
      (case 
       when xmltype(pr.attributes_de_de).extract('//attr[@name = "SellingPoint1"]/string/text()') IS NOt NULL THEN 'sellingpoint1' 
       when xmltype(pr.attributes_de_de).extract('//attr[@name = "SellingPoint2"]/string/text()') IS NOt NULL THEN 'sellingpoint2' 
      END 
      ) as testt 
    FROM product pr WHERE pr.defaultproductvariationid =(SELECT prv.uuid FROM productvariation prv WHERE prv.uuid = '3rep_vEBP6IAAAE83REjnPbb' AND pr.typecode='16')

在这种情况下，当两个“sellingpoint1”和“sellingpoint2”不为空，但此查询只返回sellingpoint1，我想“sellingpoint2”我还怎么能得到呢？

感谢您的帮助

来源

2013-02-22 user964147

你想在一列两个值？ – 2013-02-22 13:34:33

不，我想在两列中的值 – user964147 2013-02-22 13:35:08

但是，然后你的查询应该总是返回3列。只需在同一个“CASE”中使用2个不同的'CASE'语句，而不是2个条件。 – 2013-02-22 13:37:11

这使得它分成两列：

SELECT pr.uuid AS masterproductid, 
      (case when xmltype(pr.attributes_de_de).extract('//attr[@name = "SellingPoint1"]/string/text()') IS NOt NULL 
       THEN 'sellingpoint1' 
      end) as testsellingpoint1, 
      (case when xmltype(pr.attributes_de_de).extract('//attr[@name = "SellingPoint2"]/string/text()') IS NOt NULL 
        THEN 'sellingpoint2' 
      END 
      ) as testsellingpoint2 
    FROM product pr WHERE pr.defaultproductvariationid =(SELECT prv.uuid FROM productvariation prv WHERE prv.uuid = '3rep_vEBP6IAAAE83REjnPbb' AND pr.typecode='16')

来源

2013-02-22 14:09:43

我如何循环查询？

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