topic Re: How To Filter Many Row Dates > 30/11/2019 in QlikView

How To Filter Many Row Dates > 30/11/2019

haymarketpaul — Sat, 16 Nov 2024 01:45:13 GMT

I have a data source (1M Rows) with many (approx 50) dates (DD/MM/YYYY) in each row and i only need to retain rows where at least one date per row is > 30/10/2019,

Some date fields are null

So any rows that have no dates above 30/10/2019 are not needed

Here's some example data to work with...

ID	Date1	Date2	Date3
1		22/11/2019	13/02/2018
2	04/10/2019		13/04/2018
3
4		17/11/2019
5	07/02/2017	29/06/2018

So in the example above only ID 1 & 4 would be needed

Re: How To Filter Many Row Dates > 30/11/2019

Arthur_Fong — Mon, 09 Dec 2019 02:12:12 GMT

Try this:

Script:

Raw:
load * inline [
ID Date1 Date2 Date3
1 22/11/2019 13/02/2018
2 04/10/2019 13/04/2018
3
4 17/11/2019
5 07/02/2017 29/06/2018
](delimiter is ' ');

NoConcatenate
Data:
load *, Date1&'|'&Date2&'|'&Date3 as Dates;
load ID, if(isnull(Date1) or len(Date1)<1,null(),Date#(Date1,'DD/MM/YYYY')) as Date1
,if(isnull(Date2) or len(Date2)<1,null(),Date#(Date2,'DD/MM/YYYY')) as Date2 ,
if(isnull(Date3) or len(Date3)<1,null(),Date#(Date3,'DD/MM/YYYY')) as Date3
resident Raw;

drop table Raw;

Data3:
load distinct Date1 as Date, ID
resident Data;
load distinct Date2 as Date,ID
resident Data;
load distinct Date3 as Date,ID
resident Data;

NoConcatenate
Date:
load max(Date) as maxDate
resident Data3;

let maxDate = peek('maxDate',0,'Date');
let minDate = NUM(Date#('30/10/2019','DD/MM/YYYY'));

drop table Date;

Calendar:
load Date($(minDate)-1+IterNo(),'DD/MM/YYYY') as Date
AUTOGENERATE 1
WHILE $(minDate)-1+IterNo() < $(maxDate)+1;

//exit Script;
let vRow=NoOfRows('Calendar');
FOR i=0 to $(vRow)-1
let vDate=peek('Date',$(i),'Calendar');
//NoConcatenate
Data2:
load * ,1 AS Flag resident Data
where WildMatch(Dates,'*$(vDate)*');
next i

drop table Data;

exit script;

Thanks and regards,

Arthur Fong

Re: How To Filter Many Row Dates > 30/11/2019

veidlburkhard — Mon, 09 Dec 2019 11:30:09 GMT

Hi Haymarketpaul,

why not make it simple?

See the picture:

Hope this helps.

Burkhard

Re: How To Filter Many Row Dates > 30/11/2019

haymarketpaul — Mon, 09 Dec 2019 11:33:08 GMT

Thanks Arthur

Looks interesting I'll give this a go this week

Re: How To Filter Many Row Dates > 30/11/2019

haymarketpaul — Mon, 09 Dec 2019 11:35:12 GMT

Thanks for reply Burkhard

I'd need to filter our rows that don't have a date >30/10/2019 too

Re: How To Filter Many Row Dates > 30/11/2019

veidlburkhard — Mon, 09 Dec 2019 13:00:33 GMT

Sorry for this misunderstanding, Haymarketpaul.

If you need to filter out all dates > 30/11/2019 then you can do it like this:

So only Id's with dates > 30/11/2019 are left.

Hope this is ok for you.

Burkhard

Re: How To Filter Many Row Dates > 30/11/2019

Arthur_Fong — Mon, 09 Dec 2019 16:03:10 GMT

Maybe try this:

Modified the way to grab maxDate.

Instead of concatenating all dates into one table, then perform max(Date), this script will take today's date as maxDate.

Raw:
load * inline [
ID Date1 Date2 Date3
1 22/11/2019 13/02/2018
2 04/10/2019 13/04/2018
3
4 17/11/2019
5 07/02/2017 29/06/2018
](delimiter is ' ');

drop table Raw;

//Modified the way to grab maxDate

//Instead of concatenating all dates into one, take today as maxDate
let maxDate = num(today());
let minDate = NUM(Date#('30/10/2019','DD/MM/YYYY'));

Calendar:
load Date($(minDate)-1+IterNo(),'DD/MM/YYYY') as Date
AUTOGENERATE 1
WHILE $(minDate)-1+IterNo() < $(maxDate)+1;

let vRow=NoOfRows('Calendar');
FOR i=0 to $(vRow)-1
let vDate=peek('Date',$(i),'Calendar');

Data2:
load * ,1 AS Flag resident Data
where WildMatch(Dates,'*$(vDate)*');
next i

drop table Data;

exit script;