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  • oracle xmlagg 聚合,xmlagg

    2021-05-04 01:10:29
    SYS_XMLAGG(expr[,fmt]) 该函数用于汇总所有 XML 文档,并生成一个 XML 文档。 示例: SELECT SYS_XMLAGG(SYS_XMLGEN(a.order_content)) xml_content from doc_clinic_order a, clinics_item b, med_frequencydict c ...

    SYS_XMLAGG(expr[,fmt]) 该函数用于汇总所有 XML 文档,并生成一个 XML 文档。 示例: SELECT SYS_XMLAGG(SYS_XMLGEN(a.order_content)) xml_content from doc_clinic_order a, clinics_item b, med_frequencydict c where a.......

    (’Sales Representative’ as "Title"), xmlagg (xmlelement (’Name’, "FirstName", ’’, "LastName"))) FROM "Demo"."demo"."Employees" WHERE "Title" = ’Sales Representative’; might result in

    ROWID NAME --- ---AAAAASAABAAAAB6ABc ACCESS$ AAAAASAABAAAC1QAAK AGGXMLIMP AAAAASAABAAAC1QAAL AGGXQIMP AAAAASAABAAAGiRAAI ALERT_QT AAAAASAABAAAGiRAAh ALERT_QUE AAAAASAABAAAGujAAo ALERT_QUE$1 AAAAASAABAAAGujAAp ALERT......

    (ARG,LENGTH) 1 0 0 0 0 0 0 0 0 0 0 0 0 XMLCOMMENT XMLATTRIBUTES XMLAGG VERIFY_TRUSTED_CON TEXT_ROLE_FOR_USER VERIFY_ROLE_FOR_US ER VERIFY_GROUP_FOR_U SER VARIANCE_SAMP VARIANCE VARGRAPHIC VARCHAR_FORMAT VAR......

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  • xmlagg listagg

    2020-03-27 13:55:01
    select xmlagg(xmlparse(content BM.F_CAPTION||',' wellformed) order by BM.F_CAPTION).getclobval() F_ZDBM, xmlagg(xmlparse(content F_CONTRACT_NAME||',' wellformed) order by F_CONTRACT_NAME).getclobval.....

     select  xmlagg(xmlparse(content BM.F_CAPTION||',' wellformed) order by BM.F_CAPTION).getclobval() F_ZDBM, xmlagg(xmlparse(content F_CONTRACT_NAME||',' wellformed) order by F_CONTRACT_NAME).getclobval() F_CONTRACT_NAME, F_PROJECT_ID,SUM(NVL(F_TOTAL_AMT,0))AS F_HTJE  
    FROM ic_contract ht
    LEFT JOIN BF_ORG BM ON BM.F_ID=HT.F_ZDBM
    GROUP BY F_PROJECT_ID 

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  • I want equivalent to GROUP_CONCAT functionality of MySql in DB2.I have tried XML Aggrigate functon of DB2 for cocating murows.SELECT a.ID,substr(xmlserialize(xmlagg(xmltext( concat(',', SPECIALISATION...

    I want equivalent to GROUP_CONCAT functionality of MySql in DB2.

    I have tried XML Aggrigate functon of DB2 for cocating murows.

    SELECT a.ID,

    substr(xmlserialize(xmlagg(xmltext( concat(',', SPECIALISATION)))as varchar( 1024 )),2),

    substr(xmlserialize(xmlagg(xmltext(concat(',,, BASIC_SKILL2)))as varchar( 1024 )),2),

    substr(xmlserialize(xmlagg(xmltext(concat(',', BASIC_SKILL1)))as varchar( 1024 )),2)

    FROM candidate_resume_data a,candidate_skills_info b,skill_special_master c,skill_master_basic2 d,skill_master_basic1 e

    WHERE e.SKILL_BASIC1_ID = d.SKILL_BASIC1_ID

    AND b.ID = a.ID

    AND d.SKILL_BASIC2_ID = c.SKILL_BASIC2_ID

    AND b.CANDIDATE_SPECIALISATION_ID = c.SKILL_SPECIAL_ID

    GROUP BY a.ID;

    Which gives me result

    ID | SPECIALISATION | BASIC_SKILL2 | BASIC_SKILL1 |

    ----+---------------------------------------------------------------------+

    1 | Java,C++ | Development,Development | Software,Software |

    But I want distinct/Unique Value of BASIC_SKILL2,BASIC_SKILL1.

    ID | SPECIALISATION | BASIC_SKILL2 | BASIC_SKILL1 |

    ----+-------------------+-------------------+------------------+

    1 | Java,C++ | Development | Software |

    解决方案

    The select distinct won't work in case of tables with no duplicates, because of multiple joins giving all the combinations of the values of every join. That leads to duplicates in the aggregate function.

    I've found that pushing the group bys and the aggregate functions to subqueries in the from part gives the best results.

    SELECT t.id, q1.values, q2.values, q3.values

    FROM table_name t,

    inner join (select t1.id, listagg(t1.value,',') as values

    from table_name1 t1 inner join table_name t on t.id=t1.id

    group by t1.id) q1 on t.id = q1.id

    inner join (select t2.id, listagg(t2.value,',') as values

    from table_name2 t2 inner join table_name t on t.id=t2.id

    group by t2.id) q2 on t.id = q2.id

    inner join (select t3.id, listagg(t3.value,',') as values

    from table_name3 t3 inner join table_name t on t.id=t3.id

    group by t3.id) q3 on t.id = q3.id

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  • XMLAGG拼接

    2021-03-06 12:28:23
    Select Replace(TO_CHAR('"' || XMLAGG(XMLPARSE(CONTENT T1.COLUMN_NAME ||'","' WELLFORMED)).GETCLOBVAL() || ')') , ',")',' ') As A FROM DBA_TAB_COLUMNS T1 WHERE T1.OWNER = 'SCOTT' AND T1.TAB...

    工作中遇到拼接记录一下备忘

     

    XMLAGG

    SELECT REPLACE(TO_CHAR('"' || XMLAGG(XMLPARSE(CONTENT T1.COLUMN_NAME ||'","' WELLFORMED)).GETCLOBVAL() || ')') ,',")',' ') AS A
    From DBA_TAB_COLUMNS T1
    Where T1.OWNER = 'SCOTT'
    And T1.TABLE_NAME = UPPER('EMP');


     

     

     

    LISTAGG

    SELECT LISTAGG(PJ, ' ') WITHIN GROUP(ORDER BY PJ)
    FROM  (SELECT 'and t.' || REGEXP_SUBSTR('COL,CLO1,COL2', '[^,]+', 1, ROWNUM) || ' = b.' || REGEXP_SUBSTR('COL,CLO1,COL2', '[^,]+', 1, ROWNUM) AS PJ
        FROM  DUAL
        CONNECT BY ROWNUM <= LENGTH('COL,CLO1,COL2') - LENGTH(REGEXP_REPLACE('COL,CLO1,COL2', ',', '')) + 1) T

     

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  • Oracle 函数xmlagg拼接

    万次阅读 2018-08-01 22:01:53
    xmlagg(xmlparse(content 合并字段||’,’ wellformed) order by 排序字段).getclobval()
  • oracle应用之聚合函数XMLAGG用法简介

    万次阅读 2019-07-10 21:25:37
    XMLAGG函数语法基本如图, select t.item, RTRIM(XMLAGG(XMLELEMENT(e, t.rs_name, ',').extract('//text()')) .getClobVal(), ',') 材料名称 from t_itm_rcv_stuff t; ...
  • XMLAGG函数语法基本如图,可以用于列转行,列转行函数在oracle里有好几种方法,wm_concat也可以做 这里介绍wm_concat是因为XMLAGG实现效果和wm_concat是一样的,只是性能方面不一样,注意:XMLAGG最好排序一下,...
  • 03-012 oracle中xmlagg和listagg

    千次阅读 2019-12-02 15:46:09
    oracle列转换行有如下方法 一、wm_concat 1、语法 wm_concat() 实例如下 select wm_concat(distinct vendor) from ams_asset_info ...二、XMLAGG函数 ...*xmlagg(xmlparse(content 合并字段||’,’ well...
  • Oracle xmlagg拼接函数 多行转单行

    千次阅读 2019-05-20 17:18:09
    xmlagg(xmlparse(content 拼接字段 || ','wellformed) order by 排序字段).getclobval() 例如:取出所有的城市ID 为一行数据。 select xmlagg(xmlparse(content t.ID || ',' wellformed) order by t.pid)....
  • Teradata 行转列合并 逗号分隔 XMLAGG

    千次阅读 2020-04-30 13:30:11
    今天有个需求,需要查TD的表实现这个需求 查出结果为: ...后来找到了 XMLAGG函数,给的样例是下面这样的 select RQ,TRIM(TRAILING ',' FROM (XMLAGG(JX || ',')(VARCHAR(500)))) from table group by...
  • 由于在使用中listagg中的字段值拼接起来后长度超过4000,报以下错误: 经查询发现是listagg...select rtrim(xmlagg(XMLELEMENT(e,N,',').EXTRACT('//text()')).GetClobVal(),',') from test_name ; 标准如下...
  • XMLAGG用法

    千次阅读 2015-04-08 14:50:01
    SELECT A.C1, SUBSTR(XMLAGG(XMLELEMENT(A, ',', A.C2) ORDER BY A.C2).EXTRACT ('//text()'), 2) AS C2 FROM T1 A GROUP BY A.C1; C1 C2 -- -------------------------------------------------------------------...
  • 可以使用XMLAGG函数替代 SELECT name, REGEXP_REPLACE(LISTAGG(GDW.score,',') WITHIN GROUP (ORDER BY GDW.score),'([^,]+)(,\1)*(,|$)', '\1\3') AS scores --SUBSTR(XMLAGG(XMLELEMENT(GDW, ',', GDW.score) ...
  • 一、行转列listagg函数: ... 规范写法 : LISTAGG(字段, 连接符) WITHIN GROUP (ORDER BY 字段) 通常情况下,LISTAGG是满足需要的,LISTAGG 返回的是一个varchar2类型的数据,...XMLAGG返回的类型为CLOB,最大字节..
  • listagg和xmlagg

    2020-05-03 16:26:50
    下面是XMLAGG函数的例子: XMLAGG(XMLPARSE(CONTENT BSO.ID || ‘,’ WELLFORMED) ORDER BY BSO.ID).GETCLOBVAL() 规划写法: XMLAGG(XMLPARSE(CONTENT 字段 || 字符串 WELLFORMED) ORDER BY 字段).GETCLOBVAL() ...
  • Oracle中start with递归查询和XMLAGG长字符串拼接 照着博客的介绍写过类似的sql,别人介绍得很详细了,这里摘一些要点做下笔记 1、start with 语法: SELECT … FROM + 表名 START WITH + 条件1 CONNECT BY PRIOR + ...
  • Oracle LISTAGG和XMLAGG函数

    万次阅读 2019-03-19 15:55:12
    XMLAGG(XMLPARSE(CONTENT BSO.ID || ',' WELLFORMED) ORDER BY BSO.ID).GETCLOBVAL() 规划写法:  XMLAGG(XMLPARSE(CONTENT 字段 || 字符串 WELLFORMED) ORDER BY 字段).GETCLOBVAL()  
  • xmlagg( ).getclobval() 返回值 clob,程序中将clob转为string 否则会报错: Could not write content: No serializer found for class oracle.jdbc.driver.OracleClobReader and no properties discovered to ...
  • Oracle 聚合函数XMLAGG()

    千次阅读 2019-01-23 20:28:47
    select t.nation,rtrim(xmlagg(xmlelement(e,t.city,',').extract('//text()')).getclobval(),',') as citys from a_test t group by t.nation; ---结果中的聚合字段是CLOB类型,是文本字符。 ---处理400多万条...
  • 返回类型:String 3、xmlagg 使用方法:select id, xmlagg(xmlparse(content name||',' wellformed) order by name).getclobval() name from table group by id 达到的效果:1,2,3,4, 弊端:末尾会多处一个“,...

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