sql query PIVOT - sql-server

Question

I would like to arrange the sum of OrderValue by the period. My SQL query now displays in a tabular format and I want it to be in one line. If the OrderValue due is in this current, it should be under column 0, and if due next month, then it must me under column 1 and so on. Please see my SQL query
ALTER PROCEDURE [dbo].[sp_GetInvoicedPayments]
#CustomerID int
AS
BEGIN
DECLARE #endOfCurrentMonth DATE = EOMONTH(GETDATE())
SELECT [data].CustomerID, [data].[Period], SUM([data].OrderValue) AS
OrderValue
FROM (
SELECT pms.CustomerID, pms.OrderValue,
CASE
WHEN ((SELECT CAST(pms.ExpectedDate AS DATE)) <= paymentInfo.CurrentDueMonth) THEN 0
WHEN ((SELECT CAST(pms.ExpectedDate AS DATE)) <= DATEADD(s,0,DATEADD(mm, DATEDIFF(m,0, DATEADD(MONTH, 1, paymentInfo.CurrentDueMonth)) + 1,- 1)) ) THEN 1
WHEN ((SELECT CAST(pms.ExpectedDate AS DATE)) <= DATEADD(s,0,DATEADD(mm, DATEDIFF(m,0, DATEADD(MONTH, 2, paymentInfo.CurrentDueMonth)) + 1,- 1))) THEN 2
WHEN ((SELECT CAST(pms.ExpectedDate AS DATE)) <= DATEADD(s,0,DATEADD(mm, DATEDIFF(m,0, DATEADD(MONTH, 3, paymentInfo.CurrentDueMonth)) + 1,- 1))) THEN 3
WHEN ((SELECT CAST(pms.ExpectedDate AS DATE)) <= DATEADD(s,0,DATEADD(mm, DATEDIFF(m,0, DATEADD(MONTH, 4, paymentInfo.CurrentDueMonth)) + 1,- 1))) THEN 4
END AS [Period]
FROM PaymentMilestoneSummary pms
INNER JOIN (
SELECT cus.ID AS CustomerID,
CASE
WHEN cus.PaymentStatusID = 1 THEN #endOfCurrentMonth
WHEN cus.PaymentStatusID = 2 THEN (SELECT CAST(DATEADD(month, - 1, #endOfCurrentMonth) AS DATE))
WHEN cus.PaymentStatusID = 3 THEN (SELECT CAST(DATEADD(month, - 2, #endOfCurrentMonth) AS DATE))
WHEN cus.PaymentStatusID = 4 THEN (SELECT CAST(DATEADD(month, - 3, #endOfCurrentMonth) AS DATE))
WHEN cus.PaymentStatusID = 5 THEN (SELECT CAST(DATEADD(month, - 4, #endOfCurrentMonth) AS DATE))
END AS CurrentDueMonth
FROM Company cus
) paymentInfo ON pms.CustomerID = paymentInfo.CustomerID AND paymentInfo.CustomerID= #CustomerID
)[data]
GROUP BY [data].CustomerID, [data].[Period]
END
This is what I get:
This is an example of how I would like it to be:

Answer 1

You can do it like following using PIVOT and CTE
;with cte as
(
--wrap you existing query
)
SELECT
[0], [1], [2], [3], [4]
FROM
(select Period, OrderValue from cte) AS SourceTable
PIVOT
(
max(OrderValue)
FOR Period IN ([0], [1], [2], [3], [4])
) AS PivotTable;
Your procedure should look like this.
ALTER PROCEDURE [dbo].[sp_GetInvoicedPayments]
#CustomerID int
AS
BEGIN
DECLARE #endOfCurrentMonth DATE = EOMONTH(GETDATE())
;with CTE AS
(
SELECT [data].CustomerID, [data].[Period], SUM([data].OrderValue) AS
OrderValue
FROM (
SELECT pms.CustomerID, pms.OrderValue,
CASE
WHEN ((SELECT CAST(pms.ExpectedDate AS DATE)) <= paymentInfo.CurrentDueMonth) THEN 0
WHEN ((SELECT CAST(pms.ExpectedDate AS DATE)) <= DATEADD(s,0,DATEADD(mm, DATEDIFF(m,0, DATEADD(MONTH, 1, paymentInfo.CurrentDueMonth)) + 1,- 1)) ) THEN 1
WHEN ((SELECT CAST(pms.ExpectedDate AS DATE)) <= DATEADD(s,0,DATEADD(mm, DATEDIFF(m,0, DATEADD(MONTH, 2, paymentInfo.CurrentDueMonth)) + 1,- 1))) THEN 2
WHEN ((SELECT CAST(pms.ExpectedDate AS DATE)) <= DATEADD(s,0,DATEADD(mm, DATEDIFF(m,0, DATEADD(MONTH, 3, paymentInfo.CurrentDueMonth)) + 1,- 1))) THEN 3
WHEN ((SELECT CAST(pms.ExpectedDate AS DATE)) <= DATEADD(s,0,DATEADD(mm, DATEDIFF(m,0, DATEADD(MONTH, 4, paymentInfo.CurrentDueMonth)) + 1,- 1))) THEN 4
END AS [Period]
FROM PaymentMilestoneSummary pms
INNER JOIN (
SELECT cus.ID AS CustomerID,
CASE
WHEN cus.PaymentStatusID = 1 THEN #endOfCurrentMonth
WHEN cus.PaymentStatusID = 2 THEN (SELECT CAST(DATEADD(month, - 1, #endOfCurrentMonth) AS DATE))
WHEN cus.PaymentStatusID = 3 THEN (SELECT CAST(DATEADD(month, - 2, #endOfCurrentMonth) AS DATE))
WHEN cus.PaymentStatusID = 4 THEN (SELECT CAST(DATEADD(month, - 3, #endOfCurrentMonth) AS DATE))
WHEN cus.PaymentStatusID = 5 THEN (SELECT CAST(DATEADD(month, - 4, #endOfCurrentMonth) AS DATE))
END AS CurrentDueMonth
FROM Company cus
) paymentInfo ON pms.CustomerID = paymentInfo.CustomerID AND paymentInfo.CustomerID= #CustomerID
)[data]
GROUP BY [data].CustomerID, [data].[Period]
)
SELECT [0], [1], [2], [3], [4]
FROM
(select Period, OrderValue from cte) AS SourceTable
PIVOT
(
max(OrderValue)
FOR Period IN ([0], [1], [2], [3], [4])
) AS PivotTable;
END
Edit:
how would I then sum up those values I get from that one line?
To sum, you can change the pivot query like following.
SELECT
[0], [1], [2], [3], [4] , s as [Sum]
FROM
(select Period, OrderValue, sum(OrderValue) over() s from cte) AS SourceTable
PIVOT
(
max(OrderValue)
FOR Period IN ([0], [1], [2], [3], [4])
) AS PivotTable;