How to increment counter based on date selection - tsql

Question

I have a table chequeBounce with columns
Accountid ,Accountname,Chdate,chno,chamount
Now, I am creating a query which results the count of Accountid in a month. I need to increment the count of current Accountid month with previous month value based on date select by user.
Anybody can guide?

Answer 1

It's hard to know exactly what it is that you want from your question, but I made a few assumptions myself and came up with a stored procedure that might do what you want. The reason I choose a stored procedure is beacuse you imply that there should be a user defined variable.
So first of all, create this Stored Procedure:
CREATE PROCEDURE dbo.Get_Count
#month1 int,
#month2 int
AS
SELECT [source].AccountName, sum([source].chamount) as [sum of amount], count([source].AccountID) as [no of AccountID in specified months] FROM
(SELECT
AccountID, AccountName, chno, chamount
FROM chequeBounce
WHERE
MONTH(Chdate) = #month1
UNION ALL
SELECT
AccountID, AccountName, chno, chamount
FROM chequeBounce
WHERE
MONTH(Chdate) = #month2) as [source]
GROUP BY [source].AccountID, [source].AccountName, [source].chamount
RETURN 0
This Stored Procedure takes two parameters, #month1, and #month2. Then it runs two queries. One with a where statement that matches #month1 and another that does the exact same, but on #month2. It then unions them both together into one query and counts how many entries there is on each AccountID for the specified months. It allso sums the amount up the same way. You run the procedure by typing exec Get_Count followed by the two months you want to count on. Like this, if you want February and March:
exec Get_Count 2, 3
The results from above query could look something like this:
AccountName sum of amount no of AccountID in specified months
-------------------------------------------------- --------------------- ---------------
NameOne 200.00 2
NameTwo 100.00 1
NameThree 100.00 1
NameFour 200.00 2
NameFive 100.00 1
In this example no of AccountID in specified months is the count of how many occurences there is on each accountID for the specified months (2, 3).
This is the data I've used:
create table chequeBounce (
AccountID int,
AccountName varchar(50),
Chdate date,
chno int,
chamount money,
)
insert into chequeBounce VALUES
(1, 'NameOne', GETDATE(), 123, 100)
,(2, 'NameTwo', GETDATE(), 123, 100)
,(3, 'NameThree', GETDATE(), 123, 100)
,(4, 'NameFour', GETDATE(), 123, 100)
,(5, 'NameFive', GETDATE(), 123, 100)
,(1, 'NameOne', DATEADD(mm, -1, GETDATE()), 123, 100)
,(2, 'NameTwo', DATEADD(mm, -2, GETDATE()), 123, 100)
,(4, 'NameFour', DATEADD(mm, -4, GETDATE()), 123, 100)
,(5, 'NameFive', DATEADD(mm, -5, GETDATE()), 123, 100)
,(1, 'NameOne', DATEADD(mm, -2, GETDATE()), 123, 100)
,(2, 'NameTwo', DATEADD(mm, -3, GETDATE()), 123, 100)
,(4, 'NameFour', DATEADD(mm, -5, GETDATE()), 123, 100)
,(4, 'NameFour', DATEADD(mm, -3, GETDATE()), 123, 100)
,(4, 'NameFour', DATEADD(mm, -1, GETDATE()), 123, 100)
,(5, 'NameFive', DATEADD(mm, -1, GETDATE()), 123, 100)
,(1, 'NameOne', DATEADD(mm, -5, GETDATE()), 123, 100)
,(3, 'NameThree', DATEADD(mm, -1, GETDATE()), 123, 100)
,(4, 'NameFour', DATEADD(mm, -1, GETDATE()), 123, 100)
,(5, 'NameFive', DATEADD(mm, -3, GETDATE()), 123, 100)
Feel free to ask any questions if I did not make this very clear :)