嵌套表在Oracle中提供了意外的表

这些天我正在使用这个oracle脚本

create type virus_Statistic_t as object(
    vDate date,
    infection int,
    dead int,
    recovered int
)
/

create type virus_Statistic_tlb as table of virus_Statistic_t

create type countries_t as object(
    Province_or_State varchar2(50),
    Country_or_Region varchar2(100),
    Lat Number(10,6),
    Longt Number(10,6),
    virus virus_Statistic_tlb
)
/

create table countries of countries_t (
       primary key(Province_or_State, Country_or_Region)
) nested table virus store as virus_ntb;

INSERT INTO countries VALUES (
       countries_t('British Columbia', 'Canada', 49.2827, -123.1207, 
                 virus_Statistic_tlb(
                        virus_Statistic_t('22-JAN-20', 5, 0, 0), 
                        virus_Statistic_t('23-JAN-20', 10, 2, 5)
                 )
        )
);

INSERT INTO countries VALUES (
       countries_t('Queensland', 'Australia', -28.0167, 153.4, 
                 virus_Statistic_tlb(
                        virus_Statistic_t('22-JAN-20', 20, 0, 0), 
                        virus_Statistic_t('23-JAN-20', 10, 8, 10)
                 )
        )
);

select c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt,  v.vDate, v.infection, v.dead, v.recovered 
from countries c, table(c.virus) v

我跑完后，它给了我这张桌子

但我期望的桌子是

我应该对代码应用哪些更改

---

您可以在

中测试该脚本，因为您使用SQL*Plus标记对其进行了标记，然后您需要的就是break

这就是您现在拥有的：

SQL> select c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt,
  2         v.vDate, v.infection, v.dead, v.recovered
  3  from countries c, table(c.virus) v;

PROVINCE_OR_STAT COUNTRY_OR_REGION           LAT      LONGT VDATE     INFECTION       DEAD  RECOVERED
---------------- -------------------- ---------- ---------- -------- ---------- ---------- ----------
British Columbia Canada                  49,2827  -123,1207 22.01.20          5          0          0
British Columbia Canada                  49,2827  -123,1207 23.01.20         10          2          5

中断：

SQL> break on province_or_state on country_or_region on lat on longt
SQL> select c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt,
  2         v.vDate, v.infection, v.dead, v.recovered
  3  from countries c, table(c.virus) v;

PROVINCE_OR_STAT COUNTRY_OR_REGION           LAT      LONGT VDATE     INFECTION       DEAD  RECOVERED
---------------- -------------------- ---------- ---------- -------- ---------- ---------- ----------
British Columbia Canada                  49,2827  -123,1207 22.01.20          5          0          0
                                                            23.01.20         10          2          5

SQL>

其他报告工具，如Oracle Reports Builder或Apex Classic Report，都有其独特的功能

插入另一行后，实际上，break仍按预期工作：

SQL> /

PROVINCE_OR_STAT COUNTRY_OR_REGION           LAT      LONGT VDATE     INFECTION       DEAD  RECOVERED
---------------- -------------------- ---------- ---------- -------- ---------- ---------- ----------
British Columbia Canada                  49,2827  -123,1207 22.01.20          5          0          0
                                                            23.01.20         10          2          5
Queensland       Australia              -28,0167      153,4 22.01.20         20          0          0
                                                            23.01.20         10          8         10

SQL>

---

当您使用SQL*Plus标记它时，您需要的就是break

这就是您现在拥有的：

SQL> select c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt,
  2         v.vDate, v.infection, v.dead, v.recovered
  3  from countries c, table(c.virus) v;

PROVINCE_OR_STAT COUNTRY_OR_REGION           LAT      LONGT VDATE     INFECTION       DEAD  RECOVERED
---------------- -------------------- ---------- ---------- -------- ---------- ---------- ----------
British Columbia Canada                  49,2827  -123,1207 22.01.20          5          0          0
British Columbia Canada                  49,2827  -123,1207 23.01.20         10          2          5

中断：

SQL> break on province_or_state on country_or_region on lat on longt
SQL> select c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt,
  2         v.vDate, v.infection, v.dead, v.recovered
  3  from countries c, table(c.virus) v;

PROVINCE_OR_STAT COUNTRY_OR_REGION           LAT      LONGT VDATE     INFECTION       DEAD  RECOVERED
---------------- -------------------- ---------- ---------- -------- ---------- ---------- ----------
British Columbia Canada                  49,2827  -123,1207 22.01.20          5          0          0
                                                            23.01.20         10          2          5

SQL>

其他报告工具，如Oracle Reports Builder或Apex Classic Report，都有其独特的功能

插入另一行后，实际上，break仍按预期工作：

SQL> /

PROVINCE_OR_STAT COUNTRY_OR_REGION           LAT      LONGT VDATE     INFECTION       DEAD  RECOVERED
---------------- -------------------- ---------- ---------- -------- ---------- ---------- ----------
British Columbia Canada                  49,2827  -123,1207 22.01.20          5          0          0
                                                            23.01.20         10          2          5
Queensland       Australia              -28,0167      153,4 22.01.20         20          0          0
                                                            23.01.20         10          8         10

SQL>

您正在将c.virus转换到表中，它包含两条交叉连接到主表的记录。因此，您将获得两条记录1记录交叉连接2记录=2记录

您可以按如下方式使用分析函数：

SELECT CASE WHEN RN = 1 THEN Province_or_State END AS Province_or_State,
       CASE WHEN RN = 1 THEN Country_or_Region END AS Country_or_Region,
       CASE WHEN RN = 1 THEN Lat END AS Lat,
       CASE WHEN RN = 1 THEN Longt END AS Longt,
       vDate, infection, dead, recovered 
  FROM
 (select c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt,  v.vDate, v.infection, v.dead, v.recovered 
 ,ROW_NUMBER() OVER (PARTITION BY c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt ORDER BY V.VDATE) AS RN,
 , DENSE_RANK() OVER (ORDER BY c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt) AS DRN
  from countries c, table(c.virus) v)
 ORDER BY DRN, RN
/

请参见

您正在将c.virus转换到表中，它包含两条交叉连接到主表的记录。因此，您将获得两条记录1记录交叉连接2记录=2记录

您可以按如下方式使用分析函数：

SELECT CASE WHEN RN = 1 THEN Province_or_State END AS Province_or_State,
       CASE WHEN RN = 1 THEN Country_or_Region END AS Country_or_Region,
       CASE WHEN RN = 1 THEN Lat END AS Lat,
       CASE WHEN RN = 1 THEN Longt END AS Longt,
       vDate, infection, dead, recovered 
  FROM
 (select c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt,  v.vDate, v.infection, v.dead, v.recovered 
 ,ROW_NUMBER() OVER (PARTITION BY c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt ORDER BY V.VDATE) AS RN,
 , DENSE_RANK() OVER (ORDER BY c.Province_or_State, c.Country_or_Region, c.Lat, c.Longt) AS DRN
  from countries c, table(c.virus) v)
 ORDER BY DRN, RN
/

---

请参见

如果我想添加另一个省和国家，将会发生什么。它们是否也会断开？它们将自动断开：不是您指定的内容，而是您正在断开的列名。我已将省、州和国家或地区作为复合键。从技术上讲，这是不可能重复的。如果我必须输入另一个国家/地区，我希望不间断地输入。尝试插入另一行或几行以查看其行为。我编辑了答案并添加了另一个输出。在我看来没问题，或者我没有看到什么明显的东西。如果我想增加另一个省和国家，会发生什么。它们是否也会断开？它们将自动断开：不是您指定的内容，而是您正在断开的列名。我已将省、州和国家或地区作为复合键。从技术上讲，这是不可能重复的。如果我必须输入另一个国家/地区，我希望不间断地输入。尝试插入另一行或几行以查看其行为。我编辑了答案并添加了另一个输出。我觉得没问题，或者可能我没有看到明显的东西。我想我的问题不是很清楚，我已经通过插入另一个值更新了我的问题。非常感谢你一整天都在帮助我：我想我的问题不是很清楚，我已经通过插入另一个值更新了我的问题。非常感谢你一整天都在帮助我: