3

我在这个线程上发布了一个原始问题：

PIVOT Oracle - 将多行数据转换为具有多列的单行，没有聚合数据 在此处输入链接描述

我想要的结果是使用以下语句实现的：

select * from (
select "Date", subcat,category,item,tag,value from TEST2 where tag in ('LN','SN')
)
PIVOT 
(
  max(value)
  for tag in ('LN','SN')
)
order by category,subcat,item,"Date"

但是，我想将解决方案扩展为更灵活并接受 IN 子句中的动态选择。Oracle 不喜欢它并抛出了一个错误。我被指示使用枢轴 xml。经过一番研究，我想出了这个说法：

select * from (
select "Date", subcat,category,item,tag,value from TEST2 
where tag in 
   (
    Select 'LN' from dual 
     union 
    select 'SN' from dual
    )
)
PIVOT xml
(
  max(value)
  for tag in (any)
)
order by category,subcat,item,"Date"

但是我将不得不提取我想要的字段，这些字段我不太熟悉如何进行。请帮忙。

我想要的最终结果还是一样的：

在此处输入图像描述

使用 PIVOT XML，我得到了一大堆丑陋的 xml 标签！

与我的问题相关的数据是：

  CREATE TABLE "TEST2" 
   (    "Date" DATE, 
    "SUBCAT" VARCHAR2(6 BYTE), 
    "CATEGORY" VARCHAR2(7 BYTE), 
    "VALUE" VARCHAR2(17 BYTE), 
    "ITEM" VARCHAR2(2 BYTE), 
    "DESCRIPTION" VARCHAR2(15 BYTE), 
    "TAG" VARCHAR2(3 BYTE)
   ) 



Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576',null,'25','OTHER ATTRIBUTE','OA');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576',null,'25','SOME COMMENTS','SC');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576','1105618','25','Lot Number','LN');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576','12','25','NOT RELEVANT','NR');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576','45','25','NOT USE','NU');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576','-1','25','DO NOT CARE','DC');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576','3x12mm','25','Serial Number','SN');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576',null,'25','ABC','ABC');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576',null,'25','Whatever','DEF');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576',null,'28','SOME ATTRIBUTE','SA');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576',null,'28','OTHER ATTRIBUTE','OA');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576','isq: 75, 80','28','Other Comments','OC');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576',null,'28','SOME COMMENTS','SC');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576','1303757','28','Lot Number','LN');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576','12','28','NOT RELEVANT','NR');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576','40','28','NOT USE','NU');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576','0','28','DO NOT CARE','DC');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576',null,'28','ABC','ABC');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('24-OCT-13','DD-MON-RR'),'290223','1219576',null,'28','Whatever','DEF');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('18-JUN-15','DD-MON-RR'),'354506','1219576',null,'4','SOME ATTRIBUTE','SA');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('18-JUN-15','DD-MON-RR'),'354506','1219576',null,'4','OTHER ATTRIBUTE','OA');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('18-JUN-15','DD-MON-RR'),'354506','1219576','1403114','4','Lot Number','LN');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('18-JUN-15','DD-MON-RR'),'354506','1219576','11','4','NOT RELEVANT','NR');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('18-JUN-15','DD-MON-RR'),'354506','1219576','50','4','NOT USE','NU');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('18-JUN-15','DD-MON-RR'),'354506','1219576','0','4','DO NOT CARE','DC');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('18-JUN-15','DD-MON-RR'),'354506','1219576',null,'4','Whatever','DEF');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('18-JUN-15','DD-MON-RR'),'354506','1219576','7777777777','9','Lot Number','LN');
Insert into TEST2 ("Date",SUBCAT,CATEGORY,VALUE,ITEM,DESCRIPTION,TAG) values (to_date('18-JUN-15','DD-MON-RR'),'354506','1219576','9.999999999999E12','9','Serial Number','SN');
4

2 回答 2

2

...接受 IN 子句中的动态选择 ...

没有 XML 透视是不可能的。

根据您接下来需要对结果集执行的操作，您的选项是

  1. 使用 XSLT 将转换后的 XML 转换为您需要的任何内容。
  2. 代替 XML-pivot，IN在运行时构造查询的 pivot 子句（并使其成为游标、插入/选择、CTAS ......无论您需要什么。）
于 2015-06-19T06:13:58.840 回答
1 
Here is one hack that works 


with a as (select to_char(xmltype.getclobval(JOB_XML))  k  from (
select * from (select ename,job from emp)

pivot xml ( max(ename) for job in (select job from emp))))

SELECT EXTRACTVALUE(VALUE(xml_list), '//column[1]') AS interface_no
      ,EXTRACTVALUE(VALUE(xml_list), '//column[2]') AS interface_name_a
  FROM 
TABLE(XMLSEQUENCE(EXTRACT(XMLType('<?xml version="1.0" encoding="UTF-8"?>'||(select * from a) ), 'PivotSet/item'))) xml_list;
于 2020-11-28T17:39:31.727 回答