select with count for years

Question

I have pickup table which looks like this

create table Pickup
(
PickupID int IDENTITY,
ClientID int ,
PickupDate date ,
PickupProxy  varchar (200) ,
PickupHispa         


        

Answer 1

Best way to structure a query like this is to use an Index table. Ideally create this in your master database so it is available to all dbs on the server but can be created in the local db too.

You can create one like this

create table IndexTable
(
IndexID int NOT NULL,
Primary Key (IndexID),
);

Then fill it with the numbers 1 - n where n is big enough, say 1,000,000.

Like this

INSERT IndexTable
VALUES (1)

WHILE (SELECT MAX(IndexID) FROM IndexTable) < 1000000
INSERT IndexTable
SELECT IndexID + (SELECT MAX(IndexID) FROM IndexTable)
FROM IndexTable 

Your query then uses this table to treat months as integers

SELECT DATEADD(month, 0, i.IndexID) Months
      ,COUNT(p.PickupDate)
      ,AVERAGE(*Whatever*)
FROM Pickup p
     INNER JOIN
     IndexTable i ON DATEDIFF(month, p.PickupDate, 0) = i.IndexID
GROUP BY i.IndexID
WITH ROLLUP