一系列的数字,各行取值有可能与上一行是连续的,也可能是不连续的,要求对这些取值范围进行统计
如
1,2,3,4,7,8,9,15,16
统计结果应是1-4,7-9,15-16
单独的统计我知道怎么做,但是要求结果把统计区间的开始值与终止值存到一行中去,即结果如下
开始 结束
1 4
7 9
15 16请使用以下语句测试
Create Table Test (Val int)insert into test (val) values (1) --1-4
insert into test (val) values (2)
insert into test (val) values (3)
insert into test (val) values (4)
insert into test (val) values (7) --7-9
insert into test (val) values (8)
insert into test (val) values (9)
insert into test (val) values (15) --15-16
insert into test (val) values (16)Select * from test
我已经实现的分别统计区间的起始值和终止值,不知道这些语句对最终结果是否有帮助,可以参考一下
--查出连续数据的最小值
select val from test a
where not exists
(select top 1 val from test b where b.val = a.val-1)
--查出连续数据的最大值
select val from test a
where not exists
(select top 1 val from test b where b.val = a.val+1)
如
1,2,3,4,7,8,9,15,16
统计结果应是1-4,7-9,15-16
单独的统计我知道怎么做,但是要求结果把统计区间的开始值与终止值存到一行中去,即结果如下
开始 结束
1 4
7 9
15 16请使用以下语句测试
Create Table Test (Val int)insert into test (val) values (1) --1-4
insert into test (val) values (2)
insert into test (val) values (3)
insert into test (val) values (4)
insert into test (val) values (7) --7-9
insert into test (val) values (8)
insert into test (val) values (9)
insert into test (val) values (15) --15-16
insert into test (val) values (16)Select * from test
我已经实现的分别统计区间的起始值和终止值,不知道这些语句对最终结果是否有帮助,可以参考一下
--查出连续数据的最小值
select val from test a
where not exists
(select top 1 val from test b where b.val = a.val-1)
--查出连续数据的最大值
select val from test a
where not exists
(select top 1 val from test b where b.val = a.val+1)
insert into @t
select 1
union all
select 2
union all
select 3
union all
select 4
union all
select 5
union all
select 12
union all
select 17
union all
select 18
union all
select 19
union all
select 20
union all
select 25
select
rtrim(a.num) as col,(case when min(b.num)!=a.num then rtrim(min(b.num)) else '' end) as col2
from
(select t.num from @t t where not exists(select 1 from @t where num=t.num-1)) a,
(select t.num from @t t where not exists(select 1 from @t where num=t.num+1)) b
where
a.num <=b.num
group by
a.num
/*------------ ------------
1 5
12
17 20
25 (4 行受影响)*/
insert into test (val) values (2)
insert into test (val) values (3)
insert into test (val) values (4)
insert into test (val) values (7) --7-9
insert into test (val) values (8)
insert into test (val) values (9)
insert into test (val) values (15) --15-16
insert into test (val) values (16)go
;with cte as(
select val,val as val1 from test a where not exists(select 1 from test where val=a.val-1)
union all
select a.val,b.val from cte a inner join test b on a.val1=b.val-1
)select val,max(val1)val1 from cte group by val
/*
val val1
----------- -----------
1 4
7 9
15 16(3 行受影响)*/
go
drop table test
insert into @t
select 1
union all
select 2
union all
select 3
union all
select 4
union all
select 5
union all
select 12
union all
select 17
union all
select 18
union all
select 19
union all
select 20
union all
select 25 select min(num)start,
max(num)[end]
from
(select num ,num-row_number()over(order by num)as grp
from @t)as D
group by grp
/*
start end
----------- -----------
1 5
12 12
17 20
25 25*/
条件:
仅SQL Server 2000语句有效,其它版本的数据库暂不考虑
insert into @t
select 1
union all
select 2
union all
select 3
union all
select 4
union all
select 5
union all
select 12
union all
select 17
union all
select 18
union all
select 19
union all
select 20
union all
select 25 select IDENTITY(int,1,1) as id,* into #t from @tselect
min(num)start,
max(num)[end]
from
(select num ,num-id as grp from #t)as D group by grp
drop table #t
/*start end
----------- -----------
1 5
12 12
17 20
25 25(4 行受影响)
*/
相同的帖子,供大家参考结帖了,给分