Mysql 如何从数据透视表创建多个表
我有一个如下生成的透视表,Name包含列名,text包含它们的值,因此需要基于类似的值生成多个表 输入表Mysql 如何从数据透视表创建多个表,mysql,sql,sql-server,ssis,pivot,Mysql,Sql,Sql Server,Ssis,Pivot,我有一个如下生成的透视表,Name包含列名,text包含它们的值,因此需要基于类似的值生成多个表 输入表 ID Name text 1 Name,DOB John,02/02/1980 2 FirstName,SSN,City Ray,987898789,Chicago 3 Name,DOB Mary,12/21/1990 4 FirstName,SSN,City Cary,987000789,Dallas 5 PersonID
ID Name text
1 Name,DOB John,02/02/1980
2 FirstName,SSN,City Ray,987898789,Chicago
3 Name,DOB Mary,12/21/1990
4 FirstName,SSN,City Cary,987000789,Dallas
5 PersonID,Code,Zip,Gender,Maritial 1234,A456,23456,M,single
6 PersonID,Code,Zip,Gender,Maritial 1235,A457,23233,M,single
7 PersonID,Code,Zip,Gender,Maritial 1236,A458,67675,M,Married
所以输出表应该是
产出表1
ID Name DOB
1 john 02/02/1980
3 Mary 02/02/1980
产出表2
ID FirstName SSN City
2 Ray 987898789 Chicago
4 Cary 987000789 Dallas
产出表3
ID PersonID Zip Gender Marital
5 1234 A456 23456 M Single
6 1235 A457 23233 M Single
7 1236 A458 67675 M Married
有人能帮我解决这个问题吗。这可以在Sqlserver、MySQL或SSIS中实现吗?我的建议是首先规范化您的
输入表。在SQL Server中,可以使用递归CTE将逗号分隔列表中的数据拆分为行
CTE将类似于以下内容:
;with cte (id, col, Name_list, value, text_list) as
(
select id,
cast(left(Name, charindex(',',Name+',')-1) as varchar(50)) col,
stuff(Name, 1, charindex(',',Name+','), '') Name_list,
cast(left(text, charindex(',',text+',')-1) as varchar(50)) value,
stuff(text, 1, charindex(',',text+','), '') text_list
from input
union all
select id,
cast(left(Name_list, charindex(',',Name_list+',')-1) as varchar(50)) col,
stuff(Name_list, 1, charindex(',',Name_list+','), '') Name_list,
cast(left(text_list, charindex(',',text_list+',')-1) as varchar(50)) value,
stuff(text_list, 1, charindex(',',text_list+','), '') text_list
from cte
where Name_list > ''
or text_list > ''
)
select id, col, value
from cte;
看。这将为您提供以下格式的数据:
| ID | COL | VALUE |
-------------------------------
| 1 | Name | John |
| 2 | FirstName | Ray |
| 3 | Name | Mary |
| 4 | FirstName | Cary |
| 5 | PersonID | 1234 |
一旦数据采用该格式,就可以基于每个表中所需的列来透视数据
例如,如果您想要表1
的数据,您将使用:
;with cte (id, col, Name_list, value, text_list) as
(
select id,
cast(left(Name, charindex(',',Name+',')-1) as varchar(50)) col,
stuff(Name, 1, charindex(',',Name+','), '') Name_list,
cast(left(text, charindex(',',text+',')-1) as varchar(50)) value,
stuff(text, 1, charindex(',',text+','), '') text_list
from input
union all
select id,
cast(left(Name_list, charindex(',',Name_list+',')-1) as varchar(50)) col,
stuff(Name_list, 1, charindex(',',Name_list+','), '') Name_list,
cast(left(text_list, charindex(',',text_list+',')-1) as varchar(50)) value,
stuff(text_list, 1, charindex(',',text_list+','), '') text_list
from cte
where Name_list > ''
or text_list > ''
)
select *
-- into table1
from
(
select id, col, value
from cte
where col in ('Name', 'DOB')
) d
pivot
(
max(value)
for col in (Name, DOB)
) piv;
看
然后,您将用下一个表的值替换每个查询中的列名。只需手动硬编码每个查询类型;对此没有自动支持,但这比困难更乏味。