PL/SQL Oracle - 将行动态转换为字段

Question

我已经检查过这样的相同场景，但不幸的是仍然没有得到它:(，我尝试了一些代码但仍然无法工作

• 动态将行转换为字段（字段取决于行数，行数取决于类型）

表格

TYPE                |ATTR_NAME              | ATTR_VALUE
**sample flat rate  |Activity               | N
**sample flat rate  |code                   | PLAN_999
**sample flat rate  |codes object           | object
**sample low  rate  |Activity               | Y
**sample low  rate  |code                   | PLAN_1299
**sample low  rate  |codes object           | charge
**sample low  rate  |indicator              | 0

代码：

declare
  sqlqry VARCHAR2(4001);
  cols VARCHAR2(4001);
begin
  select listagg('''' || ATTR_NAME || ''' as "' || ATTR_NAME || '"', ',') within group (order by ATTR_NAME)
  into   cols
  from   (select distinct ATTR_NAME from temp_2);
sqlqry :=
'select * from
(
    select *
    from temp_2
)
pivot
(
  MIN(ATTR_VALUE) for ATTR_NAME in (' || cols  || ')    
)'
;

Answer 1

如下表：

create table temp_2 (TYPE, ATTR_NAME, ATTR_VALUE) as (
    select 'sample flat rate',  'Activity'    , 'N' from dual union all
    select 'sample flat rate',  'code'        , 'PLAN_999' from dual union all
    select 'sample flat rate',  'codes object', 'object' from dual union all
    select 'sample low  rate',  'Activity'    , 'Y' from dual union all
    select 'sample low  rate',  'code'        , 'PLAN_1299' from dual union all
    select 'sample low  rate',  'codes object', 'charge' from dual union all
    select 'sample low  rate',  'indicator'   , '0' from dual
)

这是一个工作示例：

SQL> variable x refcursor
SQL>
SQL> declare
  2    sqlqry VARCHAR2(4001);
  3    cols VARCHAR2(4001);
  4  begin
  5    select listagg('''' || ATTR_NAME || ''' as "' || ATTR_NAME || '"', ',') within group (order by ATTR_NAME)
  6    into   cols
  7    from   (select distinct ATTR_NAME from temp_2);
  8  sqlqry :=
  9      'select * from
 10      (
 11          select *
 12          from temp_2
 13      )
 14      pivot
 15      (
 16        MIN(ATTR_VALUE) for ATTR_NAME in (' || cols  || ')
 17      )';
 18  open :x for sqlqry;
 19  end;
 20  /

PL/SQL procedure successfully completed.

SQL> print :x

TYPE             Activity  code      codes obj indicator
---------------- --------- --------- --------- ---------
sample low  rate Y         PLAN_1299 charge    0
sample flat rate N         PLAN_999  object

SQL>