Question

我尝试创建自己的动态数据透视程序，但它不起作用。我的程序是正确创建的，但是当我想执行它时 - 它不起作用。首先，我尝试了bluefeet的程序并且它正在工作。链接到这个问题 Dynamically pivoting a table Oracle

我的程序应该计算列p_key中值的出现次数。

也许有人知道为什么我的程序无效。

我桌子的代码

create table aa_tabela (
C_ID number(3,0),
gcm number(1,0), 
p_key varchar2(30), 
p_count  number(6,0));

我插入了几个值

INSERT ALL 
 INTO aa_tabela (C_ID, gcm, p_key, p_count )
     VALUES (1, 7, 'Data Mining', 2)
 INTO aa_tabela (C_ID, gcm, p_key, p_count )
     VALUES (2, 5, 'Data Mining', 3)
 INTO aa_tabela (C_ID, gcm, p_key, p_count )
     VALUES (3, 3, 'Reporting', 1)
 INTO aa_tabela (C_ID, gcm, p_key, p_count )
     VALUES (4, 3, 'Olap', 5)
 INTO aa_tabela (C_ID, gcm, p_key, p_count )
     VALUES (5, 1, 'Reporting', 4)
SELECT * FROM dual;

我的静态PIVOT表正在运行：

  SELECT GCM,
   SUM(case when p_key = 'Data Mining' then p_count end) AS Data_Mining,
   SUM(case when p_key = 'Reporting' then p_count end) AS Reporting,
   SUM(case when p_key = 'Olap' then p_count end) AS OLAP 
from aa_tabela
group by  gcm
order by gcm desc;

结果：

   |GCM | DATA_MINING | REPORTING    |   OLAP   |

   | 7  |      2      |              |          |
   | 5  |      3      |              |          |
   | 3  |             |      1       |    5     |
   | 1  |             |      4       |          |

我的动态数据透视程序正确创建：

CREATE OR REPLACE procedure test_abc(p_cursor in out sys_refcursor)
AS
   sql_query long := 'select gcm ';

BEGIN
    for x in (select distinct p_key from aa_tabela order by 1)
    loop
        sql_query := sql_query ||
          ' , sum(case when p_key = '''||x.p_key||''' then p_count end) as '||x.p_key;

          dbms_output.put_line(sql_query);
    end loop;

    sql_query := sql_query || ' from aa_tabela group by gcm';

    open p_cursor for sql_query;
END;

/ 程序TEST_ABC编译

我按照以下代码执行我的程序：

variable x refcursor
exec test_abc(:x);
print x

错误讯息：

Error starting at line : 215 in command -
exec test_abc(:x)
Error report -
ORA-00923: FROM keyword not found where expected
ORA-06512: at "MAGDA.TEST_ABC", line 16
ORA-06512: at line 1
00923. 00000 -  "FROM keyword not found where expected"

Answer 1

您收到错误，因为其中一个值是“数据挖掘”。在您的程序中，它被翻译为列{i} as Data Mining等别名。您需要在第9行中将空格更改为下划线或添加配额标记：

      ' , sum(case when p_key = '''||x.p_key||''' then p_count end) as "'||x.p_key||'"';

动态数据透视表 - sql developer

1 个答案: