How to read the child elements in single query
Hi
How to read the child elements under 'alternateIdentifiers' and 'matchEntityBasic' in a single query followiing xml content.xml content is of xmltype
I/p doc
<UPDATES>
<matchEntity>
<sourceUpdateId>SAMSUNG</sourceUpdateId>
<matchEntityId>861873</matchEntityId>
<alternateIdentifiers>
<sourceUpdateId>SAMSUNG</sourceUpdateId>
<schemeCode>SMG</schemeCode>
<effectiveDate>2012-01-16</effectiveDate>
</alternateIdentifiers>
<alternateIdentifiers>
<sourceUpdateId>SAMSUNG</sourceUpdateId>
<schemeCode>TEBBGL</schemeCode>
<effectiveDate>2012-01-16</effectiveDate>
</alternateIdentifiers>
<matchEntityBasic>
<sourceUpdateId>SAMSUNG</sourceUpdateId>
<marketExchangeCode>XASE</marketExchangeCode>
</matchEntityBasic>
</matchEntity>
</UPDATES>
o/p
sourceUpdateId schemeCode effectiveDate marketExchangeCode
SAMSUNG SMG 2012-01-16 XASE
SAMSUNG TEBBGL 2012-01-16
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
i tried the query but not working
SELECT sourceUpdateId ,schemeCode ,effectiveDate ,marketExchangeCode FROM message pl,XMLTABLE ('/UPDATES/matchEntity/alternateIdentifiers'
PASSING pl.messagetext
COLUMNS sourceUpdateId VARCHAR2 (20) PATH sourceUpdateId,
schemeCode VARCHAR2 (20) PATH 'schemeCode',
effectiveDate DATE PATH 'effectiveDate',
marketExchangeCode VARCHAR2 (20) PATH './matchEntityBasic/marketExchangeCode'
) x
iam not retriving marketExchangeCode with the following query
marketExchangeCode VARCHAR2 (20) PATH './matchEntityBasic/marketExchangeCode'
thanks
The problem is that "matchEntityBasic" is not a child of "alternateIdentifiers", so this :
./matchEntityBasic/marketExchangeCodepoints to nothing.
To display both values in the same query, you'll need a two-level approach.
For example :
SQL> SELECT x2.sourceUpdateId
2 , x2.schemeCode
3 , x2.effectiveDate
4 , x1.marketExchangeCode
5 FROM message pl
6 , XMLTable(
7 '/UPDATES/matchEntity'
8 passing pl.messagetext
9 columns marketExchangeCode VARCHAR2(20) PATH 'matchEntityBasic/marketExchangeCode'
10 , alternateIds XMLType PATH 'alternateIdentifiers'
11 ) x1
12 , XMLTable(
13 '/alternateIdentifiers'
14 passing x1.alternateIds
15 columns sourceUpdateId VARCHAR2(20) PATH 'sourceUpdateId'
16 , schemeCode VARCHAR2(20) PATH 'schemeCode'
17 , effectiveDate DATE PATH 'effectiveDate'
18 ) x2
19 ;
SOURCEUPDATEID SCHEMECODE EFFECTIVEDATE MARKETEXCHANGECODE
SAMSUNG SMG 16/01/2012 XASE
SAMSUNG TEBBGL 16/01/2012 XASE
Or the shorter version :
SQL> SELECT x.sourceUpdateId
2 , x.schemeCode
3 , x.effectiveDate
4 , x.marketExchangeCode
5 FROM message pl
6 , XMLTable(
7 'for $i in /UPDATES/matchEntity
8 return
9 for $j in $i/alternateIdentifiers
10 return element r { $j/child::*, $i/matchEntityBasic/marketExchangeCode }'
11 passing pl.messagetext
12 columns sourceUpdateId VARCHAR2(20) PATH 'sourceUpdateId'
13 , schemeCode VARCHAR2(20) PATH 'schemeCode'
14 , effectiveDate DATE PATH 'effectiveDate'
15 , marketExchangeCode VARCHAR2(20) PATH 'marketExchangeCode'
16 ) x
17 ;
SOURCEUPDATEID SCHEMECODE EFFECTIVEDATE MARKETEXCHANGECODE
SAMSUNG SMG 16/01/2012 XASE
SAMSUNG TEBBGL 16/01/2012 XASE
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