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:

1. Query one group
2. In other query do sum
3. Use Union operator to combine this result set
4. 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 |