不甲骨文的PL/SQL

Question

我想以后我做的情况下statment做一个选择

即

select x from dual (x is actually a variable in a report writer tool) 
case when x = 'equipment' 
    select * from inside_sales 
else 
    select * from outside_sales 
end 

不能使用PL/SQL

任何帮助，将不胜感激

Answer 1

我想你想要这样的：

select * from inside_sales where x = 'equipment' 
union all 
select * from outside_sales where x <> 'equipment'; 

注意：如果x可以是NULL，则第二种情况会稍微复杂一些。

Answer 2

就是这样。但如何处理检索到的数据？

create function sales_report (is_x IN varchar2) 
    return // what to return? 
    is 
     row_i_s inside_sales%rowtype; 
     row_o_s ouside_sales%rowtype; 
    begin 
     case is_x 
     when 'equipment' 
     then 
     select * 
     into row_i_s 
     from inside_sales; 
     else 
     select * 
     into row_o_s 
     from outside_sales; 
     end; 
     return // what to return? 
    end;