分列汇总表中的SQL Server 2008
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25-09-2019 - |
题
我已经从外部源,这是在一个概括的格式接收到的数据。我需要一种方法来分解这种装配到我使用的系统。
要说明,假设数据I接收看起来像这样:
receivedTable:
Age Gender Count
40 M 3
41 M 2
我想这是一个分类格式是这样的:
systemTable:
ID Age Gender
1 40 M
2 40 M
3 40 M
4 41 M
5 41 M
由于结果 卡尔
解决方案
根据您可以使用保存精确的x纪录每一个整数x查找表的计数范围。像这样:
create table counter(num int)
insert into counter select 1
insert into counter select 2
insert into counter select 2
insert into counter select 3
insert into counter select 3
insert into counter select 3
insert into counter select 4
insert into counter select 4
insert into counter select 4
insert into counter select 4
,然后用此表连接:
create table source(age int, gender char(1), num int)
insert into source select 40, 'm', 3
insert into source select 30, 'f', 2
insert into source select 20, 'm', 1
--insert into destination(age, gender)
select age, gender
from source
inner join counter on counter.num = source.num
其他提示
稳定递归查询,“我的机器(TM)上的工作原理”
从约最大递归深度所有常见的注意事项。
with Expanded(exAge, exGender, exRowIndex) as
(
select
Age as exAge,
Gender as exGender,
1 as exRowIndex
from
tblTest1
union all
select
exAge,
exGender,
exRowIndex+1
from
tblTest1 t1
inner join
Expanded e on (e.exAge = t1.Age and e.exGender = t1.Gender and e.exRowIndex < t1.Count)
)
select
exAge,
exGender,
exRowIndex
from
Expanded
order by
exAge,
exGender,
exRowIndex
option (MAXRECURSION 0) -- BE CAREFUL!!
您没有得到行标识符 - 但在插入查询的结果到表包含标识列将处理与
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