这就是我所拥有的,它需要永远。我无法弄清楚这样做的另一种方式。 我尝试了更慢的游标。有任何想法吗?谢谢。
declare @i int
declare @customer_sk int
declare @numrows int
declare @iprotable TABLE (idx int Primary Key IDENTITY(1,1),customer_sk int)
INSERT @iprotable
select distinct ipro.Customer_SK from IproProfile ipro inner join vwUsageLast60Days usage on usage.Customer_SK =ipro.Customer_SK
SET @i = 1
SET @numrows = (SELECT COUNT(*) FROM @iprotable)
IF @numrows > 0
WHILE (@i <= (SELECT MAX(idx) FROM @iprotable))
BEGIN
SET @customer_sk = (SELECT customer_sk FROM @iprotable WHERE idx = @i)
update IproProfile set TopClassification=x.clas
from
(
select top 1 website web, classification clas, COUNT(classification)cnt, customer_sk cust_sk
from vwusagelast60days group by website, customer_sk, classification
having Customer_SK=@customer_sk
order by cnt desc
)x
where Customer_SK=x.cust_sk
set @i=@i+1
end