topic Re: Can we use Rowno() as LInking in Datamodel..? in QlikView

Can we use Rowno() as LInking in Datamodel..?

Fri, 17 Oct 2014 07:20:25 GMT

Hi All,

can we make use of ROWNO() as a Linking Key in the Datamodel..?

Your Help Appreciated..

Thanks,

Mohan

Re: Can we use Rowno() as LInking in Datamodel..?

MarcoWedel — Fri, 17 Oct 2014 07:31:08 GMT

Technically yes, loading RowNo() as Key, but you will get wrong associations if sequence or number of records in your tables change.

Re: Can we use Rowno() as LInking in Datamodel..?

Fri, 17 Oct 2014 10:29:01 GMT

Hi Macro,

Thanks for your Reply, but could you please look into my scenario below..

1)..I have created RowNo() as KEY in one of my Table..

let me call the Table name as Test_Table, in this table i have created the KEY from ROWNO() function.

2).. Am doing the RESIDENT LOAD of the same Test_Table again. naming this as Table_2

so link between the two tables is KEY(generated from ROWNO() function).

will it impact..?

Thanks,

Mohan

Re: Can we use Rowno() as LInking in Datamodel..?

MarcoWedel — Fri, 17 Oct 2014 11:01:18 GMT

As long as you don't recalculate the RowNo() as Key in the second (resident) load, this should work (sorting or filtering with where clause could mix the associations up).

Maybe you could evaluate the Autonumber, AutonumberHash128 (or 256) if there are combined field combinations that might serve as a key as well. This could look like:

LOAD field1,

field2,

field3,

...

AutonumberHash128(Field1, Field2, Field3) as Key

FROM yoursource;

hope this helps

regards

Marco

Re: Can we use Rowno() as LInking in Datamodel..?

Fri, 17 Oct 2014 11:30:36 GMT

Marco, Thanks a lot for your time.

I have already used the Autonumber().

Here in my current data, couldnt make out the Unique Fields.. Thats the reason am approaching this way.

Regards,

Mohan