Question

我需要在我的视图中有一个唯一的数字字段，所以我尝试使用row_num()，但我不断获得"window error" 这是用于创建视图的语法：

create or replace view DASHBOARD_P_PEILUT_NIDRESHET 
as (
    select ROW_NUMBER() over(order by d.mahoz_name) rownum1  ,
           d.MAHOZ_NAME,d.PEILUT_NIDRESHET,g.shape ,COUNT(objectid) cnt_obj 
    from dashboard_mehoz_spatial_join d,sde_user.GiS_MEHOZ g
    where d.mahoz_name=g.mahoz_name
    group by ROW_NUMBER() , d.MAHOZ_NAME, d.PEILUT_NIDRESHET, g.shape 
);

这是错误：

Error starting at line : 4 in command -
create or replace view DASHBOARD_P_PEILUT_NIDRESHET as (select ROW_NUMBER() over(order by d.mahoz_name) rownum1  ,d.MAHOZ_NAME,d.PEILUT_NIDRESHET,g.shape ,COUNT(objectid) cnt_obj 
from dashboard_mehoz_spatial_join d,sde_user.GiS_MEHOZ g
where d.mahoz_name=g.mahoz_name
group by ROW_NUMBER() , d.MAHOZ_NAME, d.PEILUT_NIDRESHET, g.shape )
Error at Command Line : 7 Column : 10
Error report -
SQL Error: ORA-30484: missing window specification for this function
30484. 00000 -  "missing window specification for this function"
*Cause:    All window functions should be followed by window specification,
           like <function>(<argument list>) OVER (<window specification>)
*Action:

我做错了什么？

Answer 1

您无法group by分析功能。但无论如何都没有必要。试试这个：

create or replace view DASHBOARD_P_PEILUT_NIDRESHET as
    select ROW_NUMBER() over (order by d.mahoz_name) as rownum1 ,
           d.MAHOZ_NAME, d.PEILUT_NIDRESHET, g.shape, COUNT(objectid) cnt_obj 
    from dashboard_mehoz_spatial_join d join
         sde_user.GiS_MEHOZ g
         on d.mahoz_name = g.mahoz_name
    group by d.MAHOZ_NAME, d.PEILUT_NIDRESHET, g.shape ;

Oracle sql使用row_num（）查询与group by

1 个答案: