SQL cross tab pivot query - sql

Question

I have a table as below.
CaseID StatusID StageID CaseRegisterTime City
1 1 5 datetime XYZ
2 1 5 datetime ABC
Now I want its Citywise count and only for only specific dates, and also in condition for statusid = 1 and stageid = 5.
Cities CurrentDate-1 CurrentDate-2 January2012-CurrentDate-3
XYZ 5 51 5008
JUS 0 0 125
ABC 1 0 48
I want my header to group cases for CaseRegisterTime as shown above.
Please help.

Answer 1

Use case when to convert your dates of interest to 'CurrentDate-1' and 'CurrentDate-2', and then pivot the results, using this strings as the new columns.
Alternatively, you can do something like this:
select City, sum(Date1) as Date1, sum(Date2) as Date2
from(
select City,
case when CaseRegisterTime='2012-01-01' then 1 else 0 end as Date1,
case when CaseRegisterTime='2012-15-01' then 1 else 0 end as Date2
from sample
) as T
group by City
you'd also have to filter out the registers which doesn't have the desired date.

Answer 2

Here's one of many ways to do it in SQL Server 2008 (using the Date datatype):
select distinct a.City as Cities
, (select count(*)
from MyTable
where CaseRegisterTime >= cast(getdate() - 1 as date)
and CaseRegisterTime < cast(getdate() - 0 as date)
and StatusID = a.StatusID
and StageID = a.StageID
and City = a.City
) as [CurrentDate-1]
, (select count(*)
from MyTable
where CaseRegisterTime >= cast(getdate() - 2 as date)
and CaseRegisterTime < cast(getdate() - 1 as date)
and StatusID = a.StatusID
and StageID = a.StageID
and City = a.City
) as [CurrentDate-2]
, (select count(*)
from MyTable
where CaseRegisterTime >= cast('20120101' as date)
and CaseRegisterTime < cast(getdate() - 2 as date)
and StatusID = a.StatusID
and StageID = a.StageID
and City = a.City
) as [January2012-CurrentDate-3]
from MyTable a
where a.StatusID = 1
and a.StageID = 5
Update
The case and sum method #JotaBe uses is about twice as fast on my box (with many less scans and reads), so here's what that could look like:
select a.City as Cities
, sum(a.[CurrentDate-1]) as [CurrentDate-1]
, sum(a.[CurrentDate-2]) as [CurrentDate-2]
, sum(a.[January2012-CurrentDate-3]) as [January2012-CurrentDate-3]
from (
select City
, case when CaseRegisterTime >= cast(getdate() - 1 as date)
and CaseRegisterTime < cast(getdate() - 0 as date)
then 1 else 0 end [CurrentDate-1]
, case when CaseRegisterTime >= cast(getdate() - 2 as date)
and CaseRegisterTime < cast(getdate() - 1 as date)
then 1 else 0 end [CurrentDate-2]
, case when CaseRegisterTime >= cast('20120101' as date)
and CaseRegisterTime < cast(getdate() - 2 as date)
then 1 else 0 end [January2012-CurrentDate-3]
from MyTable
where StatusID = 1
and StageID = 5
) as a
group by a.City

Answer 3

Something like this will do:
begin tran;
go
create table #t1(
ID int identity,
City varchar,
RegisterDate datetime
);
declare #firstDate datetime, #secondDate datetime;
set #firstDate = '2012-1-1';
set #secondDate = '2012-1-2';
insert into #t1 values
('A', #firstDate),
('A', #firstDate),
('B', #firstDate),
('B', #firstDate),
('B', #firstDate),
('A', #secondDate),
('A', #secondDate),
('A', #secondDate),
('B', #secondDate),
('B', #secondDate);
select * from #t1;
select pvt.*
from(
select ID, City, RegisterDate
from #t1
) a
pivot(
count(a.ID)
for a.RegisterDate in ([2012-1-1], [2012-1-2])
) as pvt;
drop table #t1;
go
rollback tran;