sql - how do i combine two selects from one table where one has a GROUP BY and the other has a DISTINCT -

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both of these work individually 

select  ponumber,          count(requestnumber) "innumofrequests",          sum(amount) "sumofamounts"  tableview group ponumber    select distinct ponumber,                  (10 * ceiling((datediff(day,poapproveddate,getdate()))/10))                    "binofdayssincepoapproved"                       tableview

and want end with: 

ponumber   |  innumofrequests  |  sumofamounts  |  binofdayssincepoapproved   po1        |  2                |  100           |  180 po2        |  1                |  50            |  179

tableview looks like: 

requestnumber | ponumber | amount  |  poapproved date    1             | po1      | 100.00  |  2010-01-01   2             | po1      | 100.00  |  2010-01-01   3             | po2      |  50.00  |  2010-01-02

note po1 po 2 requests , poapproved data , amount same 2 requests.

it seems easy book i'm using (the language of sql) can't figure out.
:(
alex

select *    (          select ponumber, count(requestnumber) "innumofrequests", sum(amount) "sumofamounts"            tableview           group ponumber         ) a,         (          select distinct ponumber, (10 * ceiling((datediff(day, poapproveddate, getdate()))/10)) "binofdayssincepoapproved"            tableview         ) b  a.ponumber = b.ponumber

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