SAS SQL: How to do (group base on Case) without pulling data first? -


i need count data of particular massive table without pulling data. group data , perform count...

select a.type,        a.color,        count(a.claimnumber) count_of_claim mytable group a.type, a.color

but in instance, color determined case when.. else statements. sort of this: (i made example, structure of production problem same).

select b.type,         b.color,         count(claimnumber) claimnumber_count    (         select a.type,                 case                   when a.company = 'honda'                        , substr(a.modelnum, 1, 5) <> 'aaaaa' 'red'                   when substr(a.modelnum, 1, 6) = 'bbbbbb' 'blue'                   when substr(a.modelnum, 1, 5) = 'ccccc' 'white'                   else 'black'                   end color,                 substr(a.claimnumber, 1, 10) claimnumber            mytable         ) b  group  b.type, b.color

i pulling data down, determined color when/else case, , counting how many there using group. there way can increment counter, or (grouping) without having derived table?

i read lot of questions on stackoverflow, empathized do counting on server side, , implement query such. current solution slow. pulling 1 year worth of record , counting them (over 4-5 hours).

dummy output of claim count:

type | color | count ------------------- car    red      16894 car    blue     2316 car    black    1560 car    white    89143  bus    red      165 bus    blue     9611230 bus    black    25284 bus    white    16929971

it not hard group derived column. can use column numbers variable list in group clause

select a.type,      , a.color      , count(a.claimnumber) count_of_claim mytable group 1,2

if getting performance issues when replace a.color case statement perhaps database not optimized summarize way? case seems using couple of variables make new color column perhaps can first summarize variables , run faster? if nothing else should need execute fewer substr() function calls.

select a.type      , case when a.company = 'honda'               , not (substr(a.modelnum, 1, 5) = 'aaaaa') 'red'           when substr(a.modelnum, 1, 6) = 'bbbbbb' 'blue'           when substr(a.modelnum, 1, 5) = 'ccccc' 'white'           else 'black'         end color       , sum(nobs) claimnumber_count (select type,company,modelnum            , count(claimnumber) nobs       mytable       group 1,2,3) group 1,2

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