如何根据某些值以光标状态更改顺序

Question

这是我的问题。

if ord = 'd' then 
    Ordby:= 'name' 
else 
    Ordby:= 'type'. 
end if; 
declare cursor file is 
    select type,name,location, from filemstr order by ordby; 
    begin 
    for i in file 
    loop 
    end; 

问题是秩序ordby不工作。它总是默认排序。有可能使用变量进行排序吗？我需要在以下条件下订购。我不想声明两次游标。

Answer 1

declare cursor file is 
    select type,name,location, from filemstr order by decode(ord,'d',name,type) 
    begin 
    for i in file 
    loop 
    end;