topic Re: Re: Problem with Join in QlikView

Problem with Join

stabben23 — Mon, 02 Sep 2013 19:07:33 GMT

I have a problem to do a join, my problem is this:

invoiced amount is -56200, but this invoice has been payed at two different times. So when I do a left Join it will duplicate the row with amount -56200. I have try to sum(Supplier Pay_Amount_LOCAL) and group by on Invoice No before i Make my Join, but without result, what i'm I missing here?

//Stabben

Re: Problem with Join

swuehl — Mon, 02 Sep 2013 19:31:00 GMT

How does the structure of your original tables look like? Could you post your script code snippet?

(Or even better, a small sample app with some sample data).

Re: Problem with Join

stabben23 — Mon, 02 Sep 2013 19:43:56 GMT

Temp:

Load

(EPSINO &'|'&EPDIVI&'|'&EPSPYN&'|'&EPSUNO) as %SINOKey ,
(EPCUAM*EPARAT) as [Supplier Amount_LOCAL] ,
(EPCUAM) as [Supplier Amount_FOREIGN],
EPCUCD as [Supplier Currency] ,
EPARAT as [Supplier Exchangerate] ,
From $(vQvdPath)FPLEDG.qvd (qvd)
Where EPTRCD=40

;
left Join (Temp)
Load
TEXT(EPSINO &'|'&EPDIVI&'|'&EPSPYN&'|'&EPSUNO) as %SINOKey,
(EPCUAM * EPARAT) as [Supplier Pay_Amount_LOCAL]
From $(vQvdPath)FPLEDG.qvd (qvd)
Where EPTRCD=50
;

First I Load with filter EPTRCD=40 and yhis has one row with -56200

then I join and get two rows because i have two different amount with filter EPTRCD=50

//Stabben

Re: Problem with Join

swuehl — Mon, 02 Sep 2013 19:57:57 GMT

A join may not be appropriate then. Why do you need to join?

You could consider keeping the Supplier_Amount_LOCAL value in a separate table just linked via InvoiceNo.

Or maybe create a concatenated fact table with different levels of granularity (total Supplier_Amount_LOCAL value and your detailed transactions).

Hard to say what you need to do, because data modelling should consider your complete requirements.

Re: Problem with Join

v_iyyappan — Mon, 02 Sep 2013 20:02:36 GMT

Hi,

If u are using the composite key use autonumber function using the both tables.

autonumber(EPSINO&EPDIVI&EPSPYN&EPSUNO) as %SINOKey,

Autonumber:
Returns a unique integer value for each distinct evaluated value of expression encountered during the script execution

Regards,

Re: Problem with Join

stabben23 — Mon, 02 Sep 2013 20:13:23 GMT

If i just keep the tables assosiated i will still be two lines and two amount with -56200. if I sum all transactions on this invoice it should be 0, but it doesen't. I do need this fields in the same fact table on the same aggregated level, for ex Invoice No. The whole modell is about if the supplier are due or not or if they have payed the whole amount.

Thanks for help

//stabben

Re: Problem with Join

stabben23 — Mon, 02 Sep 2013 20:32:57 GMT

Hi,

autonumber will not aggregate on Key, still two lines.

//Stabben

Re: Problem with Join

Clever_Anjos — Mon, 02 Sep 2013 20:50:34 GMT

If you use any type of JOIN, records from first table will be repeated for each matching record of second.

I can see two approaches:

1) Keep them separated

2) Concatenate both tables and then run a LOAD () GROUP BY doing your sum´s

Re: Problem with Join

Clever_Anjos — Mon, 02 Sep 2013 20:59:51 GMT

Second way would be like this:

Temp:

Load

(EPSINO &'|'&EPDIVI&'|'&EPSPYN&'|'&EPSUNO) as %SINOKey ,

(EPCUAM*EPARAT) as [Supplier Amount_LOCAL] ,

(EPCUAM) as [Supplier Amount_FOREIGN],

EPCUCD as [Supplier Currency] ,

EPARAT as [Supplier Exchangerate] ,

From $(vQvdPath)FPLEDG.qvd (qvd)

Where EPTRCD=40

;

Concatenate (Temp)

Load

TEXT(EPSINO &'|'&EPDIVI&'|'&EPSPYN&'|'&EPSUNO) as %SINOKey,

(EPCUAM * EPARAT) as [Supplier Pay_Amount_LOCAL]

From $(vQvdPath)FPLEDG.qvd (qvd)

Where EPTRCD=50;

Final:

LOAD

%SINOKey,

sum([Supplier Amount_LOCAL]) as [Supplier Amount_LOCAL],

sum([Supplier Amount_FOREIGN]) as [Supplier Amount_FOREIGN],

sum([Supplier Currency] ) as [Supplier Currency],

sum([Supplier Exchangerate]) as [Supplier Exchangerate],

sum([Supplier Pay_Amount_LOCAL]) as [Supplier Pay_Amount_LOCAL]

Resident Temp

Group By %SINOKey;

Drop Table Temp;

Re: Problem with Join

stabben23 — Mon, 02 Sep 2013 21:14:50 GMT

Will try that first thing tomorrow.

//Stabben

Re: Re: Problem with Join

swuehl — Tue, 03 Sep 2013 08:13:05 GMT

If i just keep the tables assosiated i will still be two lines and two amount with -56200. if I sum all transactions on this invoice it should be 0, but it doesen't. I do need this fields in the same fact table on the same aggregated level, for ex Invoice No. The whole modell is about if the supplier are due or not or if they have payed the whole amount.

Hm, I think it should work with the linked tables. Maybe your data model is different than I am assuming. Please note that the way you aggregate may influence the results (i.e. just aggregating fields from the one linked SupplierAmountLocal table should only aggregate the one line).

Here is an example of both methods, first using a linked table, second a concatenated fact table:

OUT:

LOAD * INLINE [

InvoiceNo, SupplierAmountLocal

90520783, -56200

];

IN:

LOAD * INLINE [

InvoiceNo, SupplierPayAmountLocal, Date,

90520783, 21515, 2013-09-01

90520783, 34685, 2013-09-02

];

CONCAT:

LOAD InvoiceNo,

SupplierAmountLocal as Value,

'OUT' as DIR

Resident OUT;

CONCATENATE

LOAD InvoiceNo,

SupplierPayAmountLocal as Value,

Date as Date2,

'IN' as DIR

Resident IN;

Doing the aggregation not in the load script has the advantage that you don't lose details (i.e. the single date balances).

Check attached.