Querying data groups with total row before starting next group? - sql

Question

I need to query some data in the below format in SQL Server:
Id Group Price
1 A 10
2 A 20
Sum 30
1 B 6
2 B 4
Sum 10
1 C 100
2 C 200
Sum 300
I was thinking to do it in the follwoing steps:
Query one group
In other query do sum
Use Union operator to combine this result set
Do step 1-3 for all groups and finally return all sub sets of data using union.
Is there a better way to do this ? May be using some out of box feature ? Please advise.
Edit:
As per suggestions and code sample I tried this code:
Select
Case
when id is null then 'SUM'
else CAST(id as Varchar(10)) end as ID,
Case when [group] is null then 'ALL' else CAST([group] as Varchar(50)) end as [group]
,Price from
(
SELECT Id, [Group],BGAApplicationID,Section, SUM(PrimaryTotalArea) AS price
FROM vwFacilityDetails
where bgaapplicationid=1102
GROUP BY Id, [Group],BGAApplicationID,Section WITH ROLLUP
) a
And Even this code as well:
Select Id, [Group],BGAApplicationID,Section, SUM(PrimaryTotalArea) AS price
From vwFacilityDetails
Where Not ([group] Is Null And id Is Null And BGAApplicationId is null and section is null) and BGAApplicationId=1102
Group By Id, [Group],BGAApplicationID,Section
With Rollup
In results it groups up the data but for every record it shows it 3 times (in both above codes) like:
2879 Existing Facilities Whole School 25.00
2879 Existing Facilities Whole School 25.00
2879 Existing Facilities Whole School 25.00
2879 ALL 25.00
I guess there is some issue in my query, please guide me here as well.
Thanks

Answer 1

SQL Server introduced GROUPING SETS which is what you should be looking to use.
SQL Fiddle
MS SQL Server 2008 Schema Setup:
Create Table vwFacilityDetails (
id int not null,
[group] char(1) not null,
PrimaryTotalArea int not null,
Section int,
bgaapplicationid int
);
Insert Into vwFacilityDetails (id, [group], Section,bgaapplicationid,PrimaryTotalArea) values
(1, 'A', 1,1102,2),
(1, 'A', 1,1102,1),
(1, 'A', 1,1102,7),
(2, 'A', 1,1102,20),
(1, 'B', 1,1102,6),
(2, 'B', 1,1102,4),
(1, 'C', 1,1102,100),
(2, 'C', 1,1102,200);
Query 1:
SELECT CASE WHEN Id is null then 'SUM'
ELSE Right(Id,10) end Id,
[Group],BGAApplicationID,Section,
SUM(PrimaryTotalArea) price
FROM vwFacilityDetails
where bgaapplicationid=1102
GROUP BY GROUPING SETS (
(Id,[Group],BGAApplicationID,Section),
([Group])
)
ORDER BY [GROUP],
ID;
Results:
| ID | GROUP | BGAAPPLICATIONID | SECTION | PRICE |
----------------------------------------------------
| 1 | A | 1102 | 1 | 10 |
| 2 | A | 1102 | 1 | 20 |
| SUM | A | (null) | (null) | 30 |
| 1 | B | 1102 | 1 | 6 |
| 2 | B | 1102 | 1 | 4 |
| SUM | B | (null) | (null) | 10 |
| 1 | C | 1102 | 1 | 100 |
| 2 | C | 1102 | 1 | 200 |
| SUM | C | (null) | (null) | 300 |

Answer 2

Select
id,
[Group],
SUM(price) AS price
From
Test
Group By
[group],
id
With
Rollup
http://sqlfiddle.com/#!3/080cd/8

Answer 3

Select Case when id is null then 'SUM' else CAST(id as Varchar(10)) end as ID
,Case when [group] is null then 'ALL' else CAST([group] as Varchar(10)) end as [group]
,Price from
(
SELECT id, [group], SUM(price) AS Price
FROM IG
GROUP BY [GROUP],ID WITH ROLLUP
) a