Dynamic Pivot Table
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I'm trying to pivot the data so that all of the PostClickConversions are aggregated for each ActivityTagID (by Date & AdID) as a column so the result set will look like this:
My attempt:
DECLARE @PivotColumnHeaders VARCHAR(MAX)
SELECT @PivotColumnHeaders =
COALESCE(
@PivotColumnHeaders + ',[' + cast([ActivityTagID] as varchar) + ']',
'[' + cast([ActivityTagID] as varchar)+ ']'
)
FROM dbo.ConversionsTest
DECLARE @PivotTableSQL NVARCHAR(MAX)
SET @PivotTableSQL = N'
SELECT *
FROM (
select [date],[AdId],[ActivityTagID],[PostClickConversions]
from dbo.ConversionsTest
) AS PivotData
PIVOT (
sum([PostClickConversions])
FOR [ActivityTagID] IN (
' + @PivotColumnHeaders + '
)
) AS PivotTable
'
EXECUTE(@PivotTableSQL)
The error message yields:
Msg 8156, Level 16, State 1, Line 14
The column '280378' was specified multiple times for 'PivotTable'.
HELP!!:w00t:
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You will need to have a distinct set of ActivityTagID in your PivotColumnHeaders. Try adding the group by ActivityTagID in your query as such:
DECLARE @PivotColumnHeaders VARCHAR(MAX)
SELECT @PivotColumnHeaders =
COALESCE(
@PivotColumnHeaders + ',[' + cast([ActivityTagID] as varchar) + ']',
'[' + cast([ActivityTagID] as varchar)+ ']'
)
FROM dbo.ConversionsTest
GROUP BY ActivityTagID
http://www.ingenioussql.com/2013/02/06/dynamic-t-sql-pivot/
Thanks,
Dave
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BOOM! Thanks, Dave!
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Something more like this maybe:
use SandBox; -- Move to a SandBox database for testing
go
create table dbo.ConversionsTest (
ActDate date,
AdId int,
ActivityTagID int,
PostImpConversions int,
PostClickConversions int
);
insert into dbo.ConversionsTest
values
('2013-04-1', 12807324, 280378, 0, 1),
('2013-04-1', 13573240, 280378, 0, 1),
('2013-04-1', 13575149, 280378, 0, 3),
('2013-04-1', 13575471, 280378, 0, 2),
('2013-04-1', 13521989, 280377, 0, 1),
('2013-04-1', 13521989, 280378, 0, 3),
('2013-04-1', 13521989, 289201, 0, 1),
('2013-04-1', 13566439, 280378, 0, 1),
('2013-04-1', 13566442, 280378, 0, 1),
('2013-04-1', 13597657, 280378, 0, 1);
go
DECLARE @PivotColumnHeaders VARCHAR(MAX);
DECLARE @PivotColumnHeaders1 VARCHAR(MAX);
with DistinctActivityTagIDs as (
select distinct ActivityTagID from dbo.ConversionsTest)
SELECT
@PivotColumnHeaders =
COALESCE(
@PivotColumnHeaders + ',[' + cast([ActivityTagID] as varchar) + ']',
'[' + cast([ActivityTagID] as varchar)+ ']'
),
@PivotColumnHeaders1 =
COALESCE(
@PivotColumnHeaders1 + ',isnull([' + cast([ActivityTagID] as varchar) + '],0) as [' + cast([ActivityTagID] as varchar) + ']',
'isnull([' + cast([ActivityTagID] as varchar) + '],0) as [' + cast([ActivityTagID] as varchar) + ']'
)
FROM
DistinctActivityTagIDs
DECLARE @PivotTableSQL NVARCHAR(MAX)
SET @PivotTableSQL = N'
SELECT [ActDate],[AdId],' + @PivotColumnHeaders1 + N'
FROM (
select [ActDate],[AdId],[ActivityTagID],[PostClickConversions]
from dbo.ConversionsTest
) AS PivotData
PIVOT (
sum([PostClickConversions])
FOR [ActivityTagID] IN (' + @PivotColumnHeaders + '
)
) AS PivotTable
'
EXECUTE(@PivotTableSQL)
go
drop table dbo.ConversionsTest;
go
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A second layer to this scenario:
Is there a way to add a "top 10" factor to only select the ActivityID's whose aggregates are in the top 10 #'s for each group?
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IniJoy (4/26/2013)
A second layer to this scenario:Is there a way to add a "top 10" factor to only select the ActivityID's whose aggregates are in the top 10 #'s for each group?
Look at how I setup my code for you; DDL for the table, sample data to load the table. That is what you will need to do for us AND include the expected results based on the sample data.
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