永洪SQL语句编写

我想实现在计算列新建一个环比计算列，用 昨日销售-前日销售 计算列做一个瀑布图，如何实现呢，昨日和前日是参数列，脚本能自动获取日期
col['销售额']，param['前日']，param['昨日'以下是sql中的语句，想要实现的就是以下效果

with
   aa as (SELECT date,avg(amount) amount FROM 数据表  where date = CURDATE()-1  group by date )
,  bb as (SELECT date,avg(amount) amount FROM 数据表 where date = CURDATE()-8  group by date )
select aa.amount-bb.amount  同比销售额  from aa,bb

1.新建 计算列_前日，内容为 if(dateGap(col['日期列'] , param['前日'],"dayofyear") ==0){col['销售额']}
2.新建 计算列_昨日，内容为 if(dateGap(col['日期列'] , param['昨日'],"dayofyear") ==0){col['销售额']}
3.新建计算列环比：if(col['计算列_前日'] != 0){(col['计算列_昨日'] - col['计算列_前日'])/col['计算列_前日']}