Displaying weeks as columns - sql

Question

Below is the script to display the number of weeks between the given dates.
SET DATEFIRST 1
SELECT ta.account, ta.customer, SUM(amount), DATEPART(ww,ta.dt) WeekNumber
FROM tablename ta
WHERE dt >= '12/01/2011 00:00:00'
and dt < '12/29/2011 00:00:00'
GROUP BY ta.account, ta.customer, DATEPART(ww,ta.dt)
How do I display the diff weeks as diff columns in my result. Any suggestion would be helpful.
Sample O/P for the above is:
Date Account Customer TotalSeconds Amount WeekNumber
2011-11-01 xx0918252 198303792R 394 2.99 45
2011-11-08 xx1006979 200100567G 92 0.16 46
2011-11-15 xx1005385 A6863744I 492 1.275 47
2011-11-21 xx1012872 D7874694G 770 0.52 48
2011-11-28 xx1006419 C7112151H 1904 2.64 49
2011-11-28 xx1006420 G7378945A 77 0.3 49
I want the O/P like:
Date Account Customer TotalSeconds Amount WeekNumber45 WeekNumber46 WeekNumber47 WeekNumber8 WeekNumber49
and their corresponding data. Hope u understand my question. Thanks in advance.
Hi All, Thanks for the suggestions n help. Finally, I got the results that i wanted for time being. I still believe that it is hard coding. Is there a better solution for this. Thanks in advance. My code is as follows:
SELECT ta.account, ta.customer,
isnull(SUM(CASE WHEN DATEPART(ww,ta.dt) = '49' THEN amount END),0) AS "Week49",
isnull(SUM(CASE WHEN DATEPART(ww,ta.dt) = '50' THEN amount END),0) AS "Week50",
isnull(SUM(CASE WHEN DATEPART(ww,ta.dt) = '51' THEN amount END),0) AS "Week51",
isnull(SUM(CASE WHEN DATEPART(ww,ta.dt) = '52' THEN amount END),0) AS "Week52",
isnull(SUM(CASE WHEN DATEPART(ww,ta.dt) = '53' THEN amount END),0) AS "Week53",
FROM (
select * from tablename
where dt >= '12/01/2011 00:00:00' and dt <= '12/31/2011 00:00:00'
) ta
group by ta.account, ta.customer

Answer 1

First of all I would put your result in temporary table for later calculations. Let's imagine that following CTE is your result:
if object_id('tempdb..#tab') is not null drop table #tab
;with cte (Date,Account,Customer,TotalSeconds,Amount,WeekNumber) as (
select cast('20111101' as datetime),'xx0918252','198303792R',394,2.99,45 union all
select '20111108','xx1006979','200100567G',92,0.16,46 union all
select '20111115','xx1005385','A6863744I',492,1.275,47 union all
select '20111121','xx1012872','D7874694G',770,0.52,48 union all
select '20111128','xx1006419','C7112151H',1904,2.64,49 union all
select '20111128','xx1006420','G7378945A',77,0.3,49
)
select * into #tab from cte
Now your computed data is in #tab table and the following query returns pivoted table for those weeknumbers:
select date, account, customer, totalSeconds, amount, [45], [46], [47], [48], [49] from
(
select date, account, customer, totalSeconds, amount, weeknumber as weeknumber from #tab
) src
pivot
(
max(weeknumber) for weekNumber in ([45], [46], [47], [48], [49])
) pvt
Dynamic version of this query might look like this:
declare #sql nvarchar(max), #cols varchar(max)
select #cols = coalesce(#cols + ',', '') + '[' + cast(weeknumber as varchar) + ']'
from (select distinct weeknumber from #tab) t
order by weeknumber
set #sql = N'
select date, account, customer, totalSeconds, amount, ' + #cols + ' from
(
select date, account, customer, totalSeconds, amount, weeknumber as weeknumber from #tab
) src
pivot
(
max(weeknumber) for weekNumber in (' + #cols + ')
) pvt
'
exec sp_executesql #sql
The result (in both cases):
date account customer totalSeconds amount 45 46 47 48 49
----------------------- --------- ---------- ------------ ---------- ------ ------ ------ ------ ------
2011-11-01 00:00:00.000 xx0918252 198303792R 394 2.990 45 NULL NULL NULL NULL
2011-11-08 00:00:00.000 xx1006979 200100567G 92 0.160 NULL 46 NULL NULL NULL
2011-11-15 00:00:00.000 xx1005385 A6863744I 492 1.275 NULL NULL 47 NULL NULL
2011-11-21 00:00:00.000 xx1012872 D7874694G 770 0.520 NULL NULL NULL 48 NULL
2011-11-28 00:00:00.000 xx1006419 C7112151H 1904 2.640 NULL NULL NULL NULL 49
2011-11-28 00:00:00.000 xx1006420 G7378945A 77 0.300 NULL NULL NULL NULL 49

Answer 2

Take a look at the PIVOT function.
Tsql pivot command

Answer 3

T-SQL Pivot function combined with dynamic SQL. Examples:
SQL Server 2005 Pivot on Unknown Number of Columns.
Pivots with Dynamic Columns in SQL Server 2005/2008.