topic Re: Synthetic Keys and Circular loop in QlikView

Synthetic Keys and Circular loop

Wed, 21 Nov 2012 10:13:19 GMT

what is the difference between Synthetic keys and Circular Loop.

Thanks,

Ritul

Re: Synthetic Keys and Circular loop

swuehl — Wed, 21 Nov 2012 11:10:29 GMT

Ritul,

you could find a description and explanation of both in the reference manual, chapter 26.5.

In short:

Synthetic keys link tables that have more than one field in common. QV creates these keys automatically.

You need at least two tables in your data model.

Though you should carefully think about avoiding these keys, you might be able to live with them.

Circular loop means you have alternative paths between two tables, so you need at least three tables in your data model to run into this. QV can't live with circular loops, it will break the loop by loosely couple one of the tables automatically.

Hope this helps,

Stefan

Re: Synthetic Keys and Circular loop

Wed, 21 Nov 2012 11:16:22 GMT

Any one with and example provide help for this

Thanks,

Ritul

Re: Synthetic Keys and Circular loop

Gysbert_Wassenaar — Wed, 21 Nov 2012 11:36:33 GMT

See here for an article about cirular references (sometimes also called loops). And read this discussion about synthetic keys.

Re: Synthetic Keys and Circular loop

Wed, 21 Nov 2012 13:42:47 GMT

Hi Gysbert,

In any application if there is any circular loop is there so what are the bad factors and the good factors. Or it is avoidable.

Same for synthetic keys please explain about for both.

Thanks,

Re: Synthetic Keys and Circular loop

er_mohit — Mon, 03 Mar 2014 09:41:07 GMT

Go to this link

How To: Prevent Circular Reference in a Qlikview Data Model » Quick – Qlear – Qool

QlikView – Resolving Synthetic keys | Learn QlikView

http://community.qlik.com/blogs/qlikviewdesignblog/2013/06/25/circular-references