/*=====================生成\修改xml========================= */
--xmlelement多个标签层级
SELECT XMLELEMENT("TEST",
XMLELEMENT("AA",
XMLELEMENT("BB", 'XXX'),
XMLELEMENT("CC", 'XXX')))
FROM DUAL;
SELECT XMLELEMENT("test")
FROM DUAL
----XMLATTRIBUTES 多个属性
SELECT XMLELEMENT("TEST",
'123',
XMLELEMENT("AA",
XMLATTRIBUTES('1235678' "test_attribute"),
XMLELEMENT("BB",
XMLATTRIBUTES('z' "attr",NULL "XO"),
'XXX'),
XMLELEMENT("CC", 'XXX')),
'qwe')
FROM DUAL;
--xmlforest ,如果要定义标签节点属性值则不能用
SELECT XMLELEMENT("TEST",XMLFOREST(NULL "WW",'1' "XX",'3' "xx")) FROM dual;
--关于空值是否会生成生应的标签
--1、xmlelement 空值或null都会有结束的标签不会出现</> ,xmlattributes 空值或null对应的键名不会出现
SELECT XMLELEMENT("test", XMLELEMENT("test1", XMLATTRIBUTES(1 "test1_attribute"),NULL),
XMLELEMENT("test2", XMLATTRIBUTES('' "test2_attribute"),''),
XMLELEMENT("test3", XMLATTRIBUTES(NULL "test3_attribute")),'haha')
FROM dual;
--2.xmlforest null整个标签名不会出现,单引号会出现
SELECT XMLELEMENT("test", XMLFOREST(NULL "test1",'' test3)) FROM dual;
--xmlagg 生成xml片段
WITH t AS (SELECT '1' a,'A' b FROM dual)-- UNION ALL SELECT '2','A' b FROM dual UNION ALL SELECT '3','B' b FROM dual)
SELECT XMLELEMENT("KK",XMLAGG(XMLELEMENT("TEST",a))) FROM t GROUP BY b;
SELECT XMLELEMENT("TT",(SELECT XMLAGG(XMLELEMENT("TEST",a) ORDER BY a) FROM t)) FROM dual;
--排序
SELECT XMLELEMENT("KK",XMLAGG(XMLELEMENT("TEST",a) ORDER BY a DESC)) FROM t GROUP BY b;
--可生成无效的xml,xml只能有一个根结节点
SELECT XMLAGG(XMLELEMENT("TEST",a)) FROM t
--以下会报错
SELECT XMLTYPE.CreateXML('<dummy>X</dummy><dummy>y</dummy>') FROM dual;
--聚合,可替代 sys_path_connect_by,listagg
WITH Q AS
(SELECT 1 KEY, 'A' X
FROM DUAL
UNION ALL
SELECT 2 KEY, 'B' X
FROM DUAL
UNION ALL
SELECT 3 KEY, 'A' X
FROM DUAL
UNION ALL
SELECT 4 KEY, 'A' X
FROM DUAL)
--SELECT X,
--RTRIM(
--XMLAGG (XMLELEMENT(e, key||',') ORDER BY key)
--) AS concatval
--FROM q
--GROUP BY X;
SELECT X,
RTRIM(XMLAGG(XMLELEMENT(E, KEY || ',') ORDER BY KEY)
.EXTRACT('//text()'),
',') AS CONCATVAL
FROM Q
GROUP BY X;
-- xmlconcat 拼接xml元素
SELECT XMLCONCAT(XMLELEMENT("x", Xmlattributes('123' "xmlns"),XMLELEMENT("y", '10'),XMLELEMENT("y", '20')),
XMLELEMENT("x",Xmlattributes('xyz' "xmlns"), XMLELEMENT("y", '20'),XMLELEMENT("y", '10')),
XMLELEMENT("x",Xmlattributes('xyz' "xmlns"), XMLELEMENT("y", '60'),XMLELEMENT("y", '10'))) FROM dual;
--UPDATEXML 修改xml标准内容和attribute
--UPDATEXML(xmltype_instance, xpath_expression, value_expr, namespace_expr)
--xml:
<DEPT>
<EMPID>1</EMPID>
<EMPNAME>Martin Chadderton</EMPNAME>
<SALARY>1000</SALARY>
</DEPT>
--可以同时修改多个标签内容
SELECT UPDATEXML(XMLTYPE('<DEPT>
<EMPID>1</EMPID>
<EMPNAME>Martin Chadderton</EMPNAME>
<SALARY>1000</SALARY>
</DEPT>'),
'/DEPT/SALARY/text()', --通过XPath表达式,指定要修改的标签元素
'1100',
'/DEPT/EMPID/text()',
'AA')
FROM DUAL;
--如果标签元素没有值,则更新该标签的数据时也会无效,这是Oracle bug 2962474
SELECT UPDATEXML(XMLTYPE('<DEPT>
<EMPID>1</EMPID>
<EMPNAME>Martin Chadderton</EMPNAME>
<SALARY></SALARY>
</DEPT>'),
'/DEPT/SALARY/text()',
'1100')
FROM DUAL;
--可通过下面语句解决,重写该标签,找不到对应要修改的标签不会报错
SELECT UPDATEXML(XMLTYPE('<DEPT>
<EMPID>1</EMPID>
<EMPNAME>Martin Chadderton</EMPNAME>
<SALARY />
</DEPT>'),
'/DEPT/SALARY',
XMLTYPE('<SALARY>1100</SALARY>'))
FROM DUAL;
--修改属性,找不到对应要修改的属性不会报错
SELECT
UPDATEXML(XMLTYPE('<DEPT>
<EMPID>1</EMPID>
<EMPNAME>Martin Chadderton</EMPNAME>
<SALARY taxable="yes">3</SALARY>
</DEPT>'),
'/DEPT/SALARY/@taxable', 'no','/DEPT/SALARY/text()','123')
FROM dual;
--更新为null
--1.
SELECT
UPDATEXML(XMLTYPE('<DEPT>
<EMPID>1</EMPID>
<EMPNAME>Martin Chadderton</EMPNAME>
<SALARY>1000</SALARY>
</DEPT>'),
'/DEPT/SALARY/text()', NULL)
FROM dual;
--2、
SELECT
UPDATEXML(XMLTYPE('<DEPT>
<EMPID>1</EMPID>
<EMPNAME>Martin Chadderton</EMPNAME>
<SALARY taxable="yes">1000</SALARY>
</DEPT>'),
'/DEPT/SALARY', null)
FROM dual;
--更新父节点,为null则所有字节点都消失,剩下父节点
SELECT
UPDATEXML(XMLTYPE('<DEPT>
<EMPID>1</EMPID>
<EMPNAME>Martin Chadderton</EMPNAME>
<SALARY taxable="yes">1000</SALARY>
</DEPT>'),
'/DEPT', null)
FROM dual;
--去除父节点下所有字节点的值(采用通配符)
--1.
SELECT
UPDATEXML(XMLTYPE('<DEPT>
<EMPID>1</EMPID>
<EMPNAME>Martin Chadderton</EMPNAME>
<SALARY>1000</SALARY>
</DEPT>'),
'/DEPT//*', NULL)
FROM dual;
--2.如果父节点有属性，一定要指出,或则更新不到数据
SELECT
UPDATEXML(XMLTYPE('<DEPT xmlns="xyz">
<EMPID>1</EMPID>
<EMPNAME>Martin Chadderton</EMPNAME>
<SALARY>1000</SALARY>
</DEPT>'),
'/DEPT/EMPID/text()', NULL,
'/DEPT/EMPNAME/text()', NULL,
'/DEPT/SALARY/text()', NULL,'xmlns="xyz"')
FROM dual;
--高级应用,指定的namespace_expr 下,更新z='10'的数值
DECLARE
X XMLTYPE := XMLTYPE('<x xmlns="xyz"><y>10</y><z>20</z><z>10</z></x>');
BEGIN
SELECT UPDATEXML(X, '/x/z[. = "10"]/text()','30','xmlns="xyz"')
INTO X
FROM DUAL;
DBMS_OUTPUT.PUT_LINE(X.GETCLOBVAL);
END;
--UPDATEXML可修改非标准xml(根节点多个)
DECLARE
X XMLTYPE := XMLTYPE('<x xmlns="xyz"><y>10</y><y>20</y></x>');
BEGIN
SELECT UPDATEXML(XMLCONCAT(XMLELEMENT("x", Xmlattributes('123' "xmlns"),XMLELEMENT("y", '10'),XMLELEMENT("y", '20')),
XMLELEMENT("x",Xmlattributes('xyz' "xmlns"), XMLELEMENT("y", '20'),XMLELEMENT("y", '10')),
XMLELEMENT("x",Xmlattributes('xyz' "xmlns"), XMLELEMENT("y", '10'),XMLELEMENT("y", '10'))), '/x/y[. = "10"]/text()','AA','xmlns="xyz"')
INTO X
FROM DUAL;
DBMS_OUTPUT.PUT_LINE(X.GETCLOBVAL);
END;
--删除某个节点
--1.通用做法 10.1之前
DECLARE
x XMLTYPE := XMLTYPE('<a><b><c>10X</c></b><b><c>20</c></b><b><c>10Y</c></b></a>');
BEGIN
SELECT UPDATEXML(x, '/a/b[starts-with(c,10)]', NULL)
INTO x
FROM dual;
dbms_output.put_line(REPLACE(x.getstringval,'<b/>',''));
END;
--2.10.2及以上(DELETEXML)
--DELETEXML(xmltype_instance, xpath_expression, namespace_expr)
DECLARE
x XMLTYPE := XMLTYPE('<a xmlns="xyz"><b><c>10X</c></b><b><c>20</c></b><b><c>10Y</c></b></a>');
BEGIN
SELECT DELETEXML(x, '/a/b[starts-with(c,10)]','xmlns="xyz"')
INTO x
FROM dual;
dbms_output.put_line(x.getstringval);
END;
--如果有父节点有属性，一定要指出,或则删不了
DECLARE
x XMLTYPE := XMLTYPE('<a xmlns="xyz"><b><c>10X</c></b><b xmlns="xyz"><c>110X</c></b></a>');
BEGIN
SELECT DELETEXML(x, '/a/b','xmlns="xyz"')
INTO x
FROM dual;
dbms_output.put_line(x.getclobval);
END;
--XMLROOT 增加xml开头信息,这个目前不支持编码的指定
SELECT XMLROOT(XMLELEMENT("x", dummy), VERSION '1.0' , STANDALONE YES) FROM dual;
--XMLCOMMENT 增加xml注释 EXTRACT('/')在sqlplus显示的时候格式会好看一些
SELECT XMLELEMENT("x",
XMLELEMENT("x1", dummy),
XMLCOMMENT('Test Comment'),
XMLELEMENT("x2", dummy)
).EXTRACT('/')
FROM dual;
--XMLCDATA 10g之前没有这个函数, CDATA节是用来告诉XML解析器将一切作为数据。如果你有一个要求发送信息,例如,有很多XML“非法”字符,如&、<和>,
--但不能包含 ]]>
SELECT UPDATEXML(XMLELEMENT("parent", XMLCDATA('Here is a string with a < and a >')),'/parent//text()','123')
FROM dual;
SELECT XMLELEMENT("parent", XMLCDATA('Here is a![[ string with a < and a')) FROM dual;
--如果值为空或null不会生成CDATA
SELECT XMLELEMENT("x", XMLCDATA('')) FROM dual;
/*=====================通过xml获取数据========================= */
--xmltable
--XMLTABLE(<xpath/query> PASSING <xmltype document>
-- COLUMNS <column alias> <datatype> PATH <xpath/query>, {<column alias> <datatype> PATH <xpath/query>...})
select *
from tt,xmltable('/ipmp/head' passing xmltype(tt.clb_content)
columns reference varchar2(99) path 'reference',
busiCode varchar2(99) path 'busiCode')
WHERE clb_content LIKE '%ipmp%';
--如果字段类型长度比值还短,会进行截取
select *
from xmltable('/a/b' passing xmltype('<a><b>1120</b><b>21230</b></a>')
columns b varchar2(2) path '.');
--不用xmltable的实现方式
SELECT
EXTRACTVALUE(VALUE(t), '/a/b') b,
EXTRACTVALUE(VALUE(t), '/a/c') a
FROM
TABLE(XMLSEQUENCE(EXTRACT(XMLTYPE('<a><b>10</b><c>20</c></a>'), '/a'))) t;
--指定返回类型
SELECT *
FROM XMLTABLE('/a/b'
PASSING XMLTYPE('<a><b>10</b></a>')
COLUMNS b_as_varchar2 VARCHAR2(2) PATH '../b',
b_as_xmltype XMLTYPE PATH '/',
b_as VARCHAR2(3) PATH '.');
--获取属性
select *
from xmltable('/a' passing xmltype('<a><b battr="1">10</b><c>20</c></a>')
columns b varchar2(2) path 'b',
battr varchar2(1) path 'b/@battr',
c varchar2(2) path 'c');
--获取指定命名空间的相关标签
select t.b, t.c
from XMLTABLE(XMLNAMESPACES('namespace2' AS "ns1"),
'/t/ns1:a'
PASSING XMLTYPE('<t><a xmlns="namespace1"><b>aa</b><c>bb</c></a><a xmlns="namespace2"><b>10</b><c>20</c></a></t>')
COLUMNS b VARCHAR2(2) PATH 'ns1:b',
c VARCHAR2(2) PATH 'ns1:c') t;
--获取指定不同命名空间的相关标签,如果xml里面有指定,在获取的时候也要指定,否则取不到数据
select t.b, t.c
from XMLTABLE(XMLNAMESPACES('namespace1' AS "ns1", 'namespace2' AS "ns2"),
'/ns1:a'
PASSING XMLTYPE('<a xmlns="namespace1"><b xmlns="namespace2">10</b><c>20</c></a>')
COLUMNS b VARCHAR2(2) PATH 'ns2:b',
c VARCHAR2(2) PATH 'ns1:c') t;--如果节点下有相关的标签,则可以通过下面去获取各自的值
--12c
SELECT c.ref, c.val
FROM XMLTABLE('/a/b/c'
PASSING XMLTYPE('<a><b><ref>1</ref><c>10</c><c>20</c><c>30</c></b></a>')
RETURNING SEQUENCE BY REF
COLUMNS ref INTEGER PATH '../ref',
val INTEGER PATH '/') p
--12c以下
SELECT p.ref, c.val
FROM XMLTABLE('/a/b'
PASSING XMLTYPE('<a><b><ref>1</ref><cc>1</cc><c>10</c><c>20</c><c>30</c></b></a>')
COLUMNS ref INTEGER PATH 'ref',
cxml XMLTYPE PATH 'c') p,
XMLTABLE('/c'
PASSING p.cxml
COLUMNS val INTEGER PATH '/') c
---XMLEXISTS 11g以上才有 XMLEXISTS(<xpath/xquery> PASSING <xmltype document>) 判断xml是否存在节点
WITH x AS (
SELECT XMLTYPE('<a><b></b></a>') a FROM dual
)
SELECT CASE WHEN XMLEXISTS('/a/c' PASSING x.a) THEN 'TRUE' ELSE 'FALSE' END
FROM x;
--带命名空间
WITH x AS (
SELECT XMLTYPE('<a xmlns="abc"><b xmlns="q"></b></a>') a FROM dual
)
SELECT CASE WHEN XMLEXISTS('declare namespace ns1="abc";declare namespace ns2="q"; (::) /ns1:a/ns2:b' PASSING x.a) THEN 'TRUE' ELSE 'FALSE' END
FROM x;
--例子
WITH t as (select xmltype('<CODEVALUE>AA</CODEVALUE>') xmlvar from dual )
select xmlvar
from t
where XMLEXISTS ('/CODEVALUE[.="AA"]' PASSING xmlvar);
WITH t as (select xmltype('
<ROWSET>
<ROW>
<CODETYPE>ClaimCause</CODETYPE>
<CODESEQNO>1</CODESEQNO>
<CODEVALUE>A</CODEVALUE>
</ROW>
<ROW>
<CODETYPE>Claim</CODETYPE>
<CODESEQNO>1</CODESEQNO>
<CODEVALUE>AA</CODEVALUE>
</ROW>
<ROW>
<VALID>Y</VALID>
<CODETYPE>Remarks</CODETYPE>
<CODESEQNO>1</CODESEQNO>
</ROW>
</ROWSET>
') xmlvar from dual )
select xmlvar
from t
where XMLEXISTS ('/ROWSET/ROW/CODEVALUE[.="AA" ]' PASSING xmlvar)
AND XMLEXISTS ('/ROWSET/ROW/CODETYPE[.="ClaimCause"]' PASSING xmlvar)
AND
XMLEXISTS ('/ROWSET/ROW[CODEVALUE="AA" and CODETYPE="Claim"]' PASSING xmlvar);
WITH t as (select xmltype('
<ROWSET>
<ROW>
<CODETYPE>ClaimCause</CODETYPE>
<CODESEQNO>1</CODESEQNO>
<CODEVALUE>A</CODEVALUE>
</ROW>
<ROW>
<CODETYPE>Claim</CODETYPE>
<CODESEQNO>1</CODESEQNO>
<CODEVALUE>AA</CODEVALUE>
</ROW>
<ROW>
<VALID>Y</VALID>
<CODETYPE>Remarks</CODETYPE>
<CODESEQNO>1</CODESEQNO>
</ROW>
</ROWSET>
') xmlvar from dual )
select xmlvar , CODETYPE, CODEVALUE
from t
,xmltable ('for $i in /ROWSET/ROW
return $i'
passing xmlvar
columns CODETYPE varchar2(100) path 'CODETYPE'
,CODEVALUE varchar2(100) path 'CODEVALUE'
) x
where x.codevalue = 'AA'
and x.codetype = 'ClaimCause'
;
