Aggregating data using preceding load.

[qliktech_uk]

Hi,

Using my first set of QVDs I want to tranform some data and load this at an aggregated level.

My first set of QVDs is at a very low granularity, I have few flags derived at that granularity but would need the data only for flag =1 .

Eg:

QVD at detailed level

Month   Account Num  Flag Amount

  1             xx                      1            10

  1             yy                      0             20

Summary QVD (where flag =1 )

Month            Amount

1                         10

Can I do a preceding load where I have only the data for flag = 1?

Thanks.

[sunny_talwar]

May be like this

LOAD Month,

     Amount

Where Flag = 1;

LOAD Month,

     AccountNum,

     Flag,

     Amount

FROM ...

[swuehl]

Try

LOAD Month, Sum(Amount) as Amount

FROM YourQVD (qvd)

WHERE Flag = 1

GROUP BY Month;

[its_anandrjs]

In summary qvd why not

Noconcatenate

Load * Resident DetailQvd Where Flag=1;

[qliktech_uk]

Thank you all.

I realised that there are more measures, some measures I need to bring it for both flag 0 and 1 and some with flag 1.

By using the where flag = 1 wouldnt work in this case.

Whats the best approach at the script level?

Is it a case of doing 2 loads one for flag = 1 and one without and concatenate?

[swuehl · Accepted solution]

You can also do it like

LOAD Month, Sum(If(Flag=1,Amount)) as AmountFlag1, Sum(If(Flag=0,Amount)) as AmountFlag0

FROM YourQVD (qvd)

GROUP BY Month;

[qliktech_uk]

thanks so much Stefan and others.