how to convert column values into comma seperated row vlaues
I have a table with values as
FKTABLE_NAME FKCOLUMN_NAME PKCOLUMN_NAME
table1 column1 column1
table1 column2 column2
table2 column1 column1
table2 column2 column2
How I need to convert this into
FKTABLE_NAME FKCOLUMN_NAME PKCOLUMN_NAME
tablel1 column1,column2 column1,column2
table12 column1,column2 column1,column2
Basically, I am trying to get the comma seperated columns gro开发者_如何学Cup by the table name.
thanks
Here's a working query on any db
select distinct table_name,
stuff((select ','+data_type
from information_schema.columns b
where b.table_name=a.table_name
for xml path(''),type).value('.[1]','nvarchar(max)'),1,1,'') AS data_types,
stuff((select ','+column_name
from information_schema.columns b
where b.table_name=a.table_name
for xml path(''),type).value('.[1]','nvarchar(max)'),1,1,'') AS column_names
from information_schema.columns a
And here is your query
select distinct FKTABLE_NAME,
stuff((select ','+FKCOLUMN_NAME
from tbl b
where b.FKTABLE_NAME=a.FKTABLE_NAME
for xml path(''),type).value('.[1]','nvarchar(max)'),1,1,'') AS FKCOLUMN_NAMES,
stuff((select ','+PKCOLUMN_NAME
from tbl b
where b.FKTABLE_NAME=a.FKTABLE_NAME
for xml path(''),type).value('.[1]','nvarchar(max)'),1,1,'') AS PKCOLUMN_NAMES
from tbl a
SELECT [Col1Name] + ',' + [Col2Name] + ',' ... + [ColNName]
FROM [tableName]
As with all string aggregation problems I advise writing a custom aggregate (and I STRONGLY advise using a clr aggregate for best performance) and write a query like this
select fktablename, stringAggregate(fkcolumnname), stringAggregate(pkcolumnname)
group by
fktablename
some tips here
other nice reading
Below SQL statement is used for converting single column data in a single row:
declare @testdata varchar(8000)
set @testdata=''
select @testdata=@testdata+NAME+', ' from User where ID in('1','2','3','4','5')
print @testdata
select substring(@testdata,0,len(@testdata))
In above the above example:
- User is a table
- NAME is column of user which data will be manuplate in row
- ID is column of user
For reference see below link:
http://www.thedevheaven.com/2012/02/column-data-in-to-single-row-with-comma.html
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