Question

我收到了来自外部来源的数据，这是一种汇总格式。我需要一种方法来分解这个以适应我正在使用的系统。

为了说明，假设我收到的数据如下所示：

receivedTable:

Age     Gender     Count
40      M          3
41      M          2

我希望这是一种像这样的分解格式：

systemTable:

ID      Age        Gender
1       40         M          
2       40         M 
3       40         M 
4       41         M          
5       41         M

感谢
卡尔

Answer 1

从“我的机器上的工作（TM）”稳定一个递归查询，包含有关最大递归深度的所有常见警告。

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!!

您没有获得行标识符 - 但是将查询结果插入到具有标识列的表中将会处理该标识符。

Answer 2

根据您的计数范围，您可以使用一个查找表，其中包含每个整数x的x个记录。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

然后加入此表：

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

在SQL Server 2008中分解汇总表

2 个答案: