Question

是否有任何SQL格式的方法，允许在多列中查找一系列值。

我获得解决方案的常规做法是：

where 
      cost_price between my_budget_price and my_affordable_price
  or
      max_retail_price between my_budget_price and my_affordable_price

  or
      offer_price between my_budget_price and my_affordable_price

这里，相同的between ... values子句在多列上重复。我不想重复。

我正在寻找类似的东西：

where my_price in between ( cost_price, max_retail_price, offer_price )
where ( cost_price, max_retail_price, offer_price ) between my_budget_price and my_affordable_price

Answer 1

在Oracle中，您可以编写用户定义的函数，并使用输入参数执行您想要的任何逻辑。

即

and 1 = my_udf(param1, param2, param3, param4)

然后在udf

中做任何你想做的事

 function my_udf(a varchar2, b varchar2, c varchar2, d varchar2) return number is
 begin
   if (any logic you want here) then
      return 1;
   else 
      return 2;
   end if;
 end;

或更具体地说：

select * 
  from some_table
 where 1 = my_udf(cost_price, max_retail_price, offer_price, 
                  my_budget_price, my_affordable_price)

并且该功能有时会像：

function my_udf(c number, r number, o number, l number, m number) return number is
begin
   if (c >= l and c <= m) or
      (r >= l and c <= m) or
      (o >= l and c <= m) then
      return 1;
   else
      return 2;
   end if; 
end;

这与：

相同

select * 
  from some_table
 where (
        (cost_price       >= my_budget_price and cost_price       <= my_affordable_price)   
    or  (max_retail_price >= my_budget_price and max_retail_price <= my_affordable_price)
    or  (offer_price      >= my_budget_price and offer_price      <= my_affordable_price)
      )

查找多列中的值范围

1 个答案: