Oracle11g 下表的sql查询帮助

我的表格结构是： 表8系统：

"ID"               NUMBER NOT NULL ENABLE,
"COUNTRY"          VARCHAR2(10 BYTE) NOT NULL ENABLE,
"COMPANYCODE"      VARCHAR2(50 BYTE) NOT NULL ENABLE,
"SYSTEM"           VARCHAR2(50 BYTE) NOT NULL ENABLE,
"NOTSTARTED"       NUMBER,
"RUNNING"          NUMBER,
"COMPLETED"        NUMBER,
"ACTUALSTARTTIME"  VARCHAR2(5 BYTE),
"ACTUALENDTIME"    VARCHAR2(5 BYTE),
"SEQUENCE"         NUMBER,
"PLANNEDSTARTTIME" VARCHAR2(5 BYTE),
"PLANNEDENDTIME"   VARCHAR2(5 BYTE),
"ESTIMATEDENDTIME" VARCHAR2(5 BYTE),
CONSTRAINT "SYSTEMRUNTIME_PK" PRIMARY KEY ("ID", "COUNTRY", "COMPANYCODE", "SYSTEM") USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT) TABLESPACE "SYSTEM" ENABLE

我需要一个将获取以下输出的输出：

COMPANYCODE                                         SYSTEM1 SYSTEM2 SYSTEM3 SYSTEM4 SYSTEM5 SYSTEM6 SYSTEM7 SYSTEM8 …   SYSTEM N
--------------------------------------------------  --------------------------- ------------------- ----------------------- ------------------------------  ------------------------------  --------------------    --------------  --------------  --------------  --------------

其中，系统按照“序列”属性进行排序

我尝试了以下查询：

    select distinct companycode, sequence, system,notstarted,running,completed
    from table_system
    where id = (select max(id) from table_system)
    order by companycode, sequence

这给我带来了以下信息

COMPANYCODE SEQUENCE    SYSTEM  NOTSTARTED  RUNNING COMPLETED
--------------------------------------------------  ----------------------  --------------------------------------------------  ----------------------  ----------------------  ----------------------
1001 Helsinki Branch    1   GAP 2 / Datastage GL    0   0   3
1001 Helsinki Branch    2   SAP GL  0   0   2
1001 Helsinki Branch    3   SAP BW  0   0   2
1002 Copenhagen Branch  1   GAP 2 / Datastage GL    0   0   3
1002 Copenhagen Branch  2   SAP GL  0   0   2
1002 Copenhagen Branch  3   SAP BW  0   0   2
1003 Oslo Branch    1   GAP 2 / Datastage GL    0   0   3
1003 Oslo Branch    2   SAP GL  0   0   2
1003 Oslo Branch    3   SAP BW  0   0   2
1004 (publ) (EUR)   1   EKO 0   0   13
1004 (publ) (EUR)   2   HA Core 0   0   6
1004 (publ) (EUR)   3   HA Post Processor   0   0   5
1004 (publ) (EUR)   4   Datastage GL    3   0   10
1004 (publ) (EUR)   5   Datastage Recon 1   0   3
1004 (publ) (EUR)   11  SAP GL  0   0   4
1004 (publ) (EUR)   21  SAP BW  0   0   4

但我希望输出是：

COMPANYCODE                                         SYSTEM1 SYSTEM2 SYSTEM3 SYSTEM4 SYSTEM5 SYSTEM6 SYSTEM7 SYSTEM8 …   SYSTEM N
--------------------------------------------------  --------------------------- ------------------- ----------------------- ------------------------------  ------------------------------  --------------------    --------------  --------------  --------------  --------------
1001 Helsinki Branch            GAP 2 / Datastage GL    SAP GL  SAP BW                          
1002 Copenhagen Branch          GAP 2 / Datastage GL    SAP GL  SAP BW                          
1003 Oslo Branch                GAP 2 / Datastage GL    SAP GL  SAP BW                          
1004 (publ) (EUR)                       EKO HA Core HA Post Processor   Datastage GL    Datastage Recon SAP GL  SAP BW      

以上任何提示都将不胜感激。 非常感谢。 维纳亚克试试：

select companycode, COLLECT(system) as systems
    from table_system
    where id = (select max(id) from table_system)    
    group by companycode
    order by companycode, sequence

您可以为此使用一个操作；但无法处理未知数量的系统（因为您需要知道解析时所选列的数量）：

因此，您需要确定所提供的系统的最大数量，并将子句添加到pivot（

9 as system9，

）以容纳所有系统。

row_number（）

将序列号转换为一个连续的数字，因此公司

1004

的第5和第6个系统之间没有太大的差距；除此之外，您还需要枢轴来处理最大可能的序列号，而不是系统的最大计数。

您需要

收集（系统按序列排序）

，并且在主

ORDER BY子句中没有
序列
。这假设客户机可以处理集合。
select * from
(
    select companycode, system,
        row_number() over (partition by id, country, companycode
            order by sequence) as rn
    from table_system
    where id = (select max(id) from table_system)
)
pivot (max(system) for rn in (1 as system1, 2 as system2, 3 as system3,
    4 as system4, 5 as system5, 6 as system6, 7 as system7, 8 as system8))
order by company code;


COMPANYCODE                                        SYSTEM1                                            SYSTEM2                                            SYSTEM3                                            SYSTEM4                                            SYSTEM5                                            SYSTEM6                                            SYSTEM7                                            SYSTEM8
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- --------------------------------------------------
1001 Helsinki Branch                               GAP 2 / Datastage GL                               SAP GL                                             SAP BW
1002 Copenhagen Branch                             GAP 2 / Datastage GL                               SAP GL                                             SAP BW
1003 Oslo Branch                                   GAP 2 / Datastage GL                               SAP GL                                             SAP BW
1004 (publ) (EUR)                                  EKO                                                HA Core                                            HA Post Processor                                  Datastage GL                                       Datastage Recon                                    SAP GL                                             SAP BW