oracle xml列轉行

原來

xml轉換： 

select * from 
(select cust_coding,delivery_amt,mth from rpt_sales_quota_month  where yearly=2019 and brand_coding='0') 
pivot xml(sum(delivery_amt) for mth in (any))

 

使用存儲過程解析xml：

create or replace procedure xml_pivot(pi_table_name   varchar2,
                                             pi_column_name  varchar2
                                             pi_create_view varchar2,
                                             )
  return varchar2 as 
                                              
                                             
  v_column      nvarchar2(50);
  v_count       number := 0;
  v_i           number;
  v_parent_node nvarchar2(4000);
  v_child_node  nvarchar2(4000);
  v_over        boolean := false;
  v_tmp         nvarchar2(50);
  v_existsnode  number;
  v_sql         clob;
  v_name        varchar2(30);
  v_name_xml    xmltype;
begin
  v_sql         := 'select x.* from ' || pi_table_name ||
                   ' a, xmltable(''/PivotSet'' passing a.' ||
                   pi_column_name || ' columns ';
  v_parent_node := '/PivotSet';
  v_child_node  := 'item[1]/column[2]';
  v_i           := 1;
  execute immediate 'select ' || pi_column_name || ' from ' ||
                    pi_table_name || ' where rownum=1'
    into v_name_xml;
  select existsnode(v_name_xml,
                    '/PivotSet/item[' || to_char(v_i) || ']/column[1]')
    into v_existsnode
    from dual;
  while v_existsnode = 1 loop
    dbms_output.put_line( 'select substr(extractvalue(' || pi_column_name ||
                      ', ''/PivotSet/item[' || to_char(v_i) || ']/column[1]''),1,30)
    from ' || '(select * from (' || pi_table_name ||  ' ) where rownum=1 ) ) x');
    execute immediate 'select substr(extractvalue(' || pi_column_name ||
                      ', ''/PivotSet/item[' || to_char(v_i) || ']/column[1]''),1,30)
    from ' || '(select * from ' || pi_table_name ||  '  where rownum=1  ) x'
      into v_name;
      
     
    
    v_sql := v_sql || '"' || v_name || '" varchar2(30) path ''item[' ||
             to_char(v_i) || ']/column[2]'',';
    v_i   := v_i + 1;
    select existsnode(v_name_xml,
                      '/PivotSet/item[' || to_char(v_i) || ']/column[1]')
      into v_existsnode
      from dual;
  end loop;
  v_sql := trim(',' from v_sql) || ') x';
  v_sql := replace(v_sql,'x.*','a.*,x.*');
  execute immediate 'create or replace view ' || pi_create_view || ' as ' || v_sql;
  /*select count(1)
    into v_count
    from user_tab_columns
   where table_name = upper(pi_create_table);
  if v_count = 0 then
    dbms_output.put_line(v_sql);
    execute immediate 'create or replace view ' || pi_create_view || ' as ' || v_sql;
  end if;*/
end;

調用：

call     xml_pivot
('(select * from (select cust_coding,delivery_amt,mth 
from rpt_sales_quota_month  where yearly=2019 and brand_coding=''0'') 
pivot xml(sum(delivery_amt) for mth in (any) )
)','mth_xml') ;