REGR_INTERCEPT
-Beispiele
Prognose des Verkaufsvolumens
with recursive years (byyear) as (
select 1991
from rdb$database
union all
select byyear + 1
from years
where byyear < 2020
),
s as (
select
extract(year from order_date) as byyear,
sum(total_value) as total_value
from sales
group by 1
),
regr as (
select
regr_intercept(total_value, byyear) as intercept,
regr_slope(total_value, byyear) as slope
from s
)
select
years.byyear as byyear,
intercept + (slope * years.byyear) as total_value
from years
cross join regr
BYYEAR TOTAL_VALUE ------ ------------ 1991 118377.35 1992 414557.62 1993 710737.89 1994 1006918.16 1995 1303098.43 1996 1599278.69 1997 1895458.96 1998 2191639.23 1999 2487819.50 2000 2783999.77 ...