我有这种情况:
drop table #t1;
drop table #t2
select *
into #t1
from
(select 'va1'c1,'vb1'c2,'vc1'c3 union all
select 'va2'c1,'vb2'c2,'vc2'c3 union all
select 'va3'c1,'vb3'c2,'vc3'c3 union all
select 'va1'c1,'vb1'c2,'vc1'c3 union all
select 'va2'c1,'vb2'c2,'vc2'c3 union all
select 'va3'c1,'vb3'c2,'vc3'c3 union all
select 'va1'c1,'vb1'c2,'vc1'c3 union all
select 'va2'c1,'vb2'c2,'vc2'c3 union all
select 'va3'c1,'vb3'c2,'vc3'c3 union all
select 'va1'c1,'vb1'c2,'vc1'c3 union all
select 'va2'c1,'vb2'c2,'vc2'c3 union all
select 'va3'c1,'vb3'c2,'vc3'c3 union all
select 'va4'c1,'vb4'c2,'vc4'c3) t
select *
into #t2
from #t1
where 0 = 1
;with tmp1 as
(
select
t1.*,
ROW_NUMBER() over (partition by t1.c1 order by (select null)) r
from
#t1 t1
left join
#t2 t2 on t1.c1 = t2.c1
where
t2.c1 is null
), tmp2 as
(
select
0 n,*
from
tmp1
union all
select
n+1 n, t1.c1, t1.c2, t1.c3, t1.r
from
tmp2 t1
join
tmp1 t2 on t1.c1 = t2.c1
and t2.r = t1.r + 1
where
n < 10
)
--insert #t2
select c1, c2, c3 --,r
from tmp2
当我运行它时,它会选择一切正常(103 条记录)。
问题是当我将此代码插入#t2(13条记录!!!)
我认为 SQL 是逐步运行并在运行期间插入记录,而我在 tmp1 中的条件已经结束......
如何解决?
我的目标是检查数据是否存在,而不是循环并插入结果......但 SQL 在第一个循环后停止......