[英]Getting distinct Values from XML in java, OSB, XQuery
<data>
<info>
<name>A</name>
</info>
<info>
<name>B</name>
</info>
<info>
<name>A</name>
</info>
<info>
<name>C</name>
</info>
<info>
<name>B</name>
</info>
</info>
有没有办法像在Java或OSB中或在Xquery中获得结果那样,在Oracle服务总线中不连续值不起作用,所以我想使java方法获得唯一的名称
<data>
<info>
<name>A</name>
</info>
<info>
<name>B</name>
</info>
<info>
<name>C</name>
</info>
</data>
我假设您要根据名称值对所有信息元素进行分组,并且每组仅输出一个信息?
let $data :=
<data>
<info>
<name>A</name>
</info>
<info>
<name>B</name>
</info>
<info>
<name>A</name>
</info>
<info>
<name>C</name>
</info>
<info>
<name>B</name>
</info>
</data>
return
<data>{
let $distinct-names := distinct-values($data/info/name)
for $name in $distinct-names
let $infos := $data/info[name eq $name]
return
$infos[1]
}</data>
我认为您也可以使用“分组依据”扩展名:
let $data :=
<data>
<info>
<name>A</name>
</info>
<info>
<name>B</name>
</info>
<info>
<name>A</name>
</info>
<info>
<name>C</name>
</info>
<info>
<name>B</name>
</info>
</data>
return
<data>{
for $info in $data/info
group $info as $infos by $info/name as $name
return
$infos[1]
}</data>
以上两个查询均返回:
<data>
<info><name>A</name></info>
<info><name>B</name></info>
<info><name>C</name></info>
</data>
我已经解决了
<CUSTOMER_NO_1>{
(for $test in fn:distinct-values($data_ENV1/ns0:data/ns0:CUST/ns0:CUSTNO)
return $test)[1]
}</CUSTOMER_NO_1>
<CUSTOMER_NO_2>{
(for $test in fn:distinct-values($data_ENV1/ns0:data/ns0:CUST/ns0:CUSTNO)
return $test)[2]
}</CUSTOMER_NO_2>
<CUSTOMER_NO_3>{
(for $test in fn:distinct-values($data_ENV1/ns0:data/ns0:CUST/ns0:CUSTNO)
return $test)[3]
}</CUSTOMER_NO_3>
<CUSTOMER_NO_4>{
(for $test in fn:distinct-values($data_ENV1/ns0:data/ns0:CUST/ns0:CUSTNO)
return $test)[4]
}</CUSTOMER_NO_4>
<CUSTOMER_NO_5>{
(for $test in fn:distinct-values($data_ENV1/ns0:data/ns0:CUST/ns0:CUSTNO)
return $test)[5]
}</CUSTOMER_NO_5>
<CUSTOMER_NO_6>{
(for $test in fn:distinct-values($data_ENV1/ns0:data/ns0:CUST/ns0:CUSTNO)
return $test)[6]
}</CUSTOMER_NO_6>
<CUSTOMER_NO_7>{
(for $test in fn:distinct-values($data_ENV1/ns0:data/ns0:CUST/ns0:CUSTNO)
return $test)[7]
}</CUSTOMER_NO_7>
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