Combine Two Queries in one SUM Case - sql-server-2008-r2

Question

I have two queries with exact same grouping but I dont seem to be able to combine them in a correct way.
Query1:
SELECT
WorkPeriods.Id AS Z_Number,
CONVERT(VARCHAR, (CONVERT(DATE, WorkPeriods.StartDate, 103)), 103) AS Z_Date,
SUM(CASE WHEN Payments.Name = 'Cash' THEN Payments.Amount ELSE 0 END) AS Cash_Payments,
COUNT(CASE WHEN Payments.Name = 'Cash' THEN 1 END) AS No_of_Tickets_Cash,
SUM(CASE WHEN Payments.Name = 'Credit Card' THEN Payments.Amount ELSE 0 END) AS Credit_Card_Payments,
COUNT(CASE WHEN Payments.Name = 'Credit Card' THEN 1 END) AS No_of_Tickets_Credit_Card
FROM
Payments, WorkPeriods
WHERE
Payments.Date BETWEEN WorkPeriods.StartDate AND WorkPeriods.EndDate
GROUP BY
WorkPeriods.Id, WorkPeriods.StartDate
Query 2:
SELECT
WorkPeriods.Id AS Z_Number,
CONVERT(VARCHAR, (CONVERT(DATE, WorkPeriods.StartDate, 103)), 103) AS Z_Date,
SUM(CASE WHEN Orders.CalculatePrice = 0 THEN Orders.Quantity * Orders.Price ELSE 0 END) AS Gifts_Amount,
SUM(CASE WHEN Orders.CalculatePrice = 0 THEN Orders.Quantity ELSE 0 END) AS No_of_Gift_Orders
FROM
Orders, WorkPeriods
WHERE
Orders.CreatedDateTime BETWEEN WorkPeriods.StartDate AND WorkPeriods.EndDate
GROUP BY
WorkPeriods.Id, WorkPeriods.StartDate
Any advice on how to continue? I have already tried merging them using all 3 tables and all sum-count conditions but the result I get is wrong. I need all results to appear on the same row. Attached are query results

Answer 1

You can't just join them all in the one query, as you will get incorrect values as soon as you get multiple orders or payments in the same workperiod.
You could use the current queries as sub queries, and full join them to get the result. By using full join you get any results that are only on one table and not the other.
Select ISNULL(Pay.Z_Number, Ord.Z_Number) As Z_Number,
ISNULL(Pay.Z_Date, Ord.Z_Date) as Z_Date,
Pay.CashPayments,
Pay.No_of_Tickets_Cash,
Ord.Gifts_Amount
--other fields as appropriate
FROM (
--Query 1 here
) AS Pay
FULL OUTER JOIN (
--Query 2 here
) as Ord ON Pay.Z_Number = Ord.Z_Number and Pay.Z_Date = Ord.Z_Date
Another way to do this, is to create one sub query that has the data from both payments and orders in it unioned together, and then sum the resulting list in the outer query.

Answer 2

Below sample query may be helpful
SELECT
MAIN_T.Z_Number
,MAIN_T.Z_Date
,T1.Cash_Payments
,T1.Credit_Card_Payments
,T1.No_of_Tickets_Cash
,T1.No_of_Tickets_Credit_Card
,T2.Gifts_Amount
,T2.No_of_Gift_Orders
FROM
(SELECT DISTINCT
WorkPeriods.Id AS Z_Number,
CONVERT(VARCHAR, (CONVERT(DATE, WorkPeriods.StartDate, 103)), 103) AS Z_Date
FROM
Payments, WorkPeriods
WHERE
Payments.Date BETWEEN WorkPeriods.StartDate AND WorkPeriods.EndDate ) MAIN_T
LEFT JOIN
(SELECT
WorkPeriods.Id AS Z_Number,
CONVERT(VARCHAR, (CONVERT(DATE, WorkPeriods.StartDate, 103)), 103) AS Z_Date,
SUM(CASE WHEN Payments.Name = 'Cash' THEN Payments.Amount ELSE 0 END) AS Cash_Payments,
COUNT(CASE WHEN Payments.Name = 'Cash' THEN 1 END) AS No_of_Tickets_Cash,
SUM(CASE WHEN Payments.Name = 'Credit Card' THEN Payments.Amount ELSE 0 END) AS Credit_Card_Payments,
COUNT(CASE WHEN Payments.Name = 'Credit Card' THEN 1 END) AS No_of_Tickets_Credit_Card
FROM
Payments, WorkPeriods
WHERE
Payments.Date BETWEEN WorkPeriods.StartDate AND WorkPeriods.EndDate
GROUP BY
WorkPeriods.Id, WorkPeriods.StartDate) T1
ON MAIN_T.Z_Number=T1.Z_Number AND MAIN_T.Z_Date=T1.Z_Date
LEFT JOIN
(SELECT
WorkPeriods.Id AS Z_Number,
CONVERT(VARCHAR, (CONVERT(DATE, WorkPeriods.StartDate, 103)), 103) AS Z_Date,
SUM(CASE WHEN Orders.CalculatePrice = 0 THEN Orders.Quantity * Orders.Price ELSE 0 END) AS Gifts_Amount,
SUM(CASE WHEN Orders.CalculatePrice = 0 THEN Orders.Quantity ELSE 0 END) AS No_of_Gift_Orders
FROM
Orders, WorkPeriods
WHERE
Orders.CreatedDateTime BETWEEN WorkPeriods.StartDate AND WorkPeriods.EndDate
GROUP BY
WorkPeriods.Id, WorkPeriods.StartDate) T2
ON MAIN_T.Z_Number=T2.Z_Number AND MAIN_T.Z_Date=T2.Z_Date