topic Re: Load Record with Max value only in QlikView

Load Record with Max value only

Tue, 17 Jun 2014 14:04:06 GMT

From the following script, i only want to load the record with the max setupdate

I am really struggling making others' answers work for my application.It's a simple thought...so i'm sure someone has a simple answer

Temp:

LOAD * INLINE [

Company, Contact, SetupDate, Source, RecNo

1, David, 41607, AMP, 123

1, Tom, 41609, Label, 456

1, Mary, 41610, Internet, 789

2, Joe, 40600, Referral, 1011

3, Tom, 41666, Internet, 1213

3, Peter, 40600, AMP, 1415

];

I want to return all fields, Company, Contact, Source, Recno ...but only the one with the max date. (By company)

Final:

LOAD * INLINE [

Company, Contact, SetupDate, Source, RecNo

1, Mary, 41610, Internet, 789

2, Joe, 40600, Referral, 1011

3, Tom, 41666, Internet, 1213

];

so i should return 3 records...the 3rd, 4th, and 5th records based on the setupdate by company. I want to do this in the script, please help

-David

Re: Load Record with Max value only

venkatg6759 — Tue, 17 Jun 2014 14:13:11 GMT

Left Join (Temp)

Load

Company,

max(Timestamp(SetupDate),'MM/DD/YYYY hh:mm:ss') as MaxDate

Resident Temp Group by Company;

Final:

Noconcatenate

Load * Resident Temp Where SetupDate=MaxDate;

Drop Table Temp;

Re: Load Record with Max value only

venkatg6759 — Tue, 17 Jun 2014 14:17:08 GMT

Check the attachment .

Thanks,

Venkata

Re: Load Record with Max value only

Tue, 17 Jun 2014 14:18:05 GMT

Thank you for the quick response...My reload is getting hung up on doing it this way...is there another way to attack this problem?

Re: Load Record with Max value only

Tue, 17 Jun 2014 14:18:22 GMT

Thank you! I'm unfortunately on personal edition

Re: Load Record with Max value only

venkatg6759 — Tue, 17 Jun 2014 14:19:39 GMT

Copy the code

Temp:

LOAD * INLINE [

Company, Contact, SetupDate, Source, RecNo

1, David, 41607, AMP, 123

1, Tom, 41609, Label, 456

1, Mary, 41610, Internet, 789

2, Joe, 40600, Referral, 1011

3, Tom, 41666, Internet, 1213

3, Peter, 40600, AMP, 1415

];

Left Join (Temp)

Load

Company,

max(Timestamp(SetupDate),'MM/DD/YYYY hh:mm:ss') as MaxDate

Resident Temp Group by Company;

Final:

Noconcatenate

Load * Resident Temp Where SetupDate=MaxDate;

Drop Table Temp;

Re: Load Record with Max value only

Tue, 17 Jun 2014 14:22:25 GMT

This is just a small example, that i'm trying to port over into a larger process...is there another way to get after this same solution?

Thank you sincerely !!

Re: Load Record with Max value only

venkatg6759 — Tue, 17 Jun 2014 14:24:39 GMT

Post your qvw and let us know know what you are trying to accomplish.

Re: Load Record with Max value only

rwunderlich — Tue, 17 Jun 2014 14:26:18 GMT

I would approach it like this:

INNER JOIN (Temp)

LOAD

max(SetupDate) as SetupDate,

Company

RESIDENT Temp

GROUP BY Company

;

-Rob

Re: Load Record with Max value only

Tue, 17 Jun 2014 14:26:19 GMT

Hi David,

you can fill first a refenrece table ony with max dates by company you want to keep

LOAD

Company, as Ref_Company

max(contact) as Ref_date

from ... group by company

Then load your full table

LOAD * FROM .... WHERE EXISTS(Ref_Company & Ref_Date, Company & Contatc)

best regards

chris

Re: Load Record with Max value only

Clever_Anjos — Tue, 17 Jun 2014 14:26:29 GMT

tmp:

LOAD * INLINE [

Company, Contact, SetupDate, Source, RecNo

1, David, 41607, AMP, 123

1, Tom, 41609, Label, 456

1, Mary, 41610, Internet, 789

2, Joe, 40600, Referral, 1011

3, Tom, 41666, Internet, 1213

3, Peter, 40600, AMP, 1415

];

filter:

inner keep load

Company,

max(SetupDate) as SetupDate

resident tmp

group by Company;

drop table filter;

Re: Load Record with Max value only

Tue, 17 Jun 2014 14:34:11 GMT

The inner keep option is amazing and simple! Thank you very much QV friends