我將提出一個挑戰，誰能用SQLSEERVER提出計算素數最好的方法，
我用了一個新的特點CTE和某些TSQL實現，但均不理想，前者（CTE）有限制，而後者（TSQL）產生一百萬個素數用了7分種
你可以干的更好麼？
這兒是我的一些代碼段落
（TSQL實現）
set nocount on
declare @prime table (prime int not null primary key)
--insert into @prime values (2)
--insert into @prime values (3)
--insert into @prime values (5)
--insert into @prime values (7)
--insert into @prime values (11)
declare @number int, @pc int
set @number = 13
set @pc = 1
while @pc < 1000000
begin
if not exists (select 1 from @prime where @number % prime = 0 and prime < sqrt(@number) )
begin
insert into @prime select @number
set @pc = @pc 1
end
set @number = @number
case when @number %2 = 1 then 2
when @number %3 = 2 then 2
when @number %5 = 4 then 2
when @number %7 = 6 then 2
when @number = 10 then 2
else 1 end
end
select @pc
和
（CTE實現）
with seq
as( select 13 number
union all
select s.number
case when s.number %2 = 1 then 2
when s.number %3 = 2 then 2
when s.number %5 = 4 then 2
when s.number %7 = 6 then 2
when s.number = 10 then 2
else 1 end
from seq s
where number < 32767
)
, prime as (
select s.number
from seq s
where not exists ( select 1 from seq s2 where s2.number < s.number and (s.number) % s2.number = 0)
)
select *
from prime
option (MAXRECURSION 32767)
