topic Distinct table isn't distinct after preceding load in QlikView

Distinct table isn't distinct after preceding load

kristof_j — Tue, 01 Apr 2014 08:47:06 GMT

I did something really simple

LOAD Distinct MonthStart(Date) as month

Resident Orders;

I have now a distinct table with months.

But I wanted to add the previous month. So I did the next thing ...

LOAD month
,AddMonths(month,-1) as [month-1];
LOAD Distinct MonthStart(Date) as month
Resident Orders;

And now my table isn't distinct anymore. It's like QV ignores the first 'Distinct'.

When I add a distinct in the preceding load the table is distinct again

My problem is that there is an impact on efficiency.

Did I do something wrong?

thanks in advance

Re: Distinct table isn't distinct after preceding load

Gysbert_Wassenaar — Tue, 01 Apr 2014 09:22:14 GMT

You didn't do anything wrong. It's just that the results from the lower load statement are piped directly into the preceding load. That's why the distinct in the lower load statement has no effect.

Btw you can get the result you want like this too:

LOAD Distinct MonthStart(Date) as month, MonthStart(Date,-1) as [month-1]

Resident Orders;

Re: Distinct table isn't distinct after preceding load

tresB — Tue, 01 Apr 2014 09:32:05 GMT

Now, it's a known fact. Please refer ;Re: Precedent Load vs Resident Load and LOAD DISTINCT and Preceding Loads