How to Summarize a Detailed Debtors Aging Report

Question

Dear All,
I have written a Query for a Detailed Debtors Aging Report - i.e a report which lists ALL unpaid invoices. It works smoothly.
I use SAP B1 8.8.
Now, I want to create a Summarized Debtors Aging Report  which groups all the unpaid invoices for a particular debtor and displays only 1 row for each debtor.
I use the following commands: SUM(), GROUP BY to modify the original query.
A very simplified version of my Detailed report is in Screen 1.
The modifications I made to it to convert it to a Summarized report are in Screen 2. It does not work!
I have traced the error to the following:
SUM ((SELECT T0.BalDueDeb - T0.BalDueCred WHERE DateDiff(mm, T0.TaxDate,@taxdt) = 1))
AS '1 Mth Ago'
This is the code I use to put the amount due in the appropriate Age Bracket.
The SQL Error Message is:
Cannot perform an aggregate function on an expression containing an aggregate or a sub query
Could you please help me rewrite this so that it works?
Thanks
Leon Lai
Screen 1 : The Original DETAILED report
declare @taxdt datetime
set @taxdt
/*select 1 from jdt1 t0 where t0.TaxDate*/ = [%1]
SELECT
CASE
             WHEN T0.Account = 1220101 THEN 'Prim Cust'
             WHEN T0.Account = 1220102 THEN 'Fgn Cust'
             WHEN T0.Account = 1220103 THEN 'Local Cust'
             WHEN T0.Account = 1220104 THEN 'Staff Loan' 
             WHEN T0.Account = 1220105 THEN 'Dep with TP'
             WHEN T0.Account = 1220106 THEN 'Adv to Cust'
             WHEN T0.Account = 1220108 THEN 'Sund Drs'
             ELSE 'Error ! ! !'
END AS 'Control A/c',
T1.CardCode AS 'BP Code',
T2.Notes2 AS 'BP Name',
(T0.Debit - T0.Credit) AS 'Orig. Rs',
(T0.BalDueDeb - T0.BalDueCred) AS 'Bal. Rs',
(SELECT T0.BalDueDeb - T0.BalDueCred WHERE DateDiff(mm, T0.TaxDate, @taxdt) = 1)
AS '1 Mth Ago'
FROM JDT1 T0
INNER JOIN OCRD T1 ON T0.ShortName = T1.CardCode
LEFT OUTER JOIN OCPR T2 ON T1.CardCode = T2.Cardcode
LEFT OUTER JOIN OJDT T3 ON T0.TransID = T3.TransID
LEFT OUTER JOIN OINV  T4 ON T3.TransID = T4.TransID
LEFT OUTER JOIN ORIN  T5 ON T3.TransID = T5.TransID
WHERE
T1.CardType = 'C'
and (Balance) != 0
and (T0.BalDueDeb - T0.BalDueCred) != 0
Screen 2 : The Modified SUMMARY report
declare @taxdt datetime
set @taxdt
/*select 1 from jdt1 t0 where t0.TaxDate*/ = [%1]
SELECT
CASE
             WHEN T0.Account = 1220101 THEN 'Prim Cust'
             WHEN T0.Account = 1220102 THEN 'Fgn Cust'
             WHEN T0.Account = 1220103 THEN 'Local Cust'
             WHEN T0.Account = 1220104 THEN 'Staff Loan' 
             WHEN T0.Account = 1220105 THEN 'Dep with TP'
             WHEN T0.Account = 1220106 THEN 'Adv to Cust'
             WHEN T0.Account = 1220108 THEN 'Sund Drs'
             ELSE 'Error ! ! !'
END AS 'Control A/c',
T1.CardCode AS 'BP Code',
T2.Notes2 AS 'BP Name',
SUM ((T0.Debit - T0.Credit)) AS 'Orig. Rs',                 /* Added SUM()*/
SUM ((T0.BalDueDeb - T0.BalDueCred)) AS 'Bal. Rs',         /*Added SUM()*/
SUM ((SELECT T0.BalDueDeb - T0.BalDueCred
    WHERE DateDiff(mm, T0.TaxDate, @taxdt) = 1))    
    AS '1 Mth Ago'               /*Added SUM() PROBLEM IS HERE! */
FROM JDT1 T0
INNER JOIN OCRD T1 ON T0.ShortName = T1.CardCode
LEFT OUTER JOIN OCPR T2 ON T1.CardCode = T2.Cardcode
LEFT OUTER JOIN OJDT T3 ON T0.TransID = T3.TransID
LEFT OUTER JOIN OINV  T4 ON T3.TransID = T4.TransID
LEFT OUTER JOIN ORIN  T5 ON T3.TransID = T5.TransID
WHERE
T1.CardType = 'C'
and (Balance) != 0
and (T0.BalDueDeb - T0.BalDueCred) != 0
GROUP BY T0.Account, T1.CardCode, T2.Notes2                   /*Added GROUP BY*/

Answer 1

Hi,
Try:
declare @taxdt datetime
set @taxdt
/*select 1 from jdt1 t0 where t0.TaxDate*/ = [%1]
SELECT
CASE     T0.Account
        WHEN 1220101 THEN 'Prim Cust'
        WHEN 1220102 THEN 'Fgn Cust'
        WHEN 1220103 THEN 'Local Cust'
        WHEN 1220104 THEN 'Staff Loan' 
        WHEN 1220105 THEN 'Dep with TP'
        WHEN 1220106 THEN 'Adv to Cust'
        WHEN 1220108 THEN 'Sund Drs'
        ELSE 'Error ! ! !'
END AS 'Control A/c',
T1.CardCode AS 'BP Code',
T2.Notes2 AS 'BP Name',
SUM (T0.Debit - T0.Credit) AS 'Orig. Rs',                 /* Added SUM()*/
SUM (T0.BalDueDeb - T0.BalDueCred) AS 'Bal. Rs',         /*Added SUM()*/
(SELECT SUM (T6.BalDueDeb - T6.BalDueCred) FROM JDT1 T6
    WHERE DateDiff(mm, T6.TaxDate, @taxdt) = 1 AND T6.TransID=T1.TransID)   
    AS '1 Mth Ago'               /*Added SUM() PROBLEM IS HERE! */
FROM JDT1 T0
INNER JOIN OCRD T1 ON T0.ShortName = T1.CardCode
LEFT JOIN OCPR T2 ON T1.CardCode = T2.Cardcode
LEFT JOIN OJDT T3 ON T0.TransID = T3.TransID
LEFT JOIN OINV  T4 ON T3.TransID = T4.TransID
LEFT JOIN ORIN  T5 ON T3.TransID = T5.TransID
WHERE
T1.CardType = 'C'
and (Balance) != 0
and (T0.BalDueDeb - T0.BalDueCred) != 0
GROUP BY T0.Account, T1.CardCode, T2.Notes2                   /*Added GROUP BY*/
Thanks,
Gordon