topic Load only row with max data in App Development

Load only row with max data

nehasaxena — Tue, 23 Jan 2018 13:31:42 GMT

Hello Experts,

I have been trying to load only the max date record with the following script -

[Twitter]:

LOAD [company_name],

[positive_percent],

[negative_percent],

[neutral_percent],

[load_date]

FROM [lib://Desktop/Twitter.xlsx]

(ooxml, embedded labels, table is Sheet1);

Right Join (Twitter)

LOAD [company_name],

Max([load_date]) as Date

Resident Twitter

Group by [company_name];

After reload I am still getting all the rows (attached image)

I am kind of stuck here. Is it because I have timestamp in my load_date field ?

Please guide me.

Best Regards,

Neha

Re: Load only row with max data

sunny_talwar — Tue, 23 Jan 2018 13:49:36 GMT

Try this

[Twitter]:

LOAD [company_name],

[positive_percent],

[negative_percent],

[neutral_percent],

[load_date]

FROM [lib://Desktop/Twitter.xlsx]

(ooxml, embedded labels, table is Sheet1);

Right Join (Twitter)

LOAD [company_name],

Max([load_date]) as [load_date]

Resident Twitter

Group by [company_name];

Re: Load only row with max data

ericasense — Tue, 23 Jan 2018 15:18:27 GMT

Hi, I think you're almost there.

I would make sure you format the date in the original table and the date in the right join the same. I imagine the date is coming through like you said as a timestamp, and the max(...) is returning a number.

LOAD

...

timestamp(Load_Date) as Load_Date

...

from [...];

right join (xxx)

Load

company_name,

timestamp(max(Load_Date)) as Load_Date

REsident.....

The other thing you could try is the firstSortedValue() function, but you would need to repeat it for every field. This returns the first value, for a field in a specified sort order. You would need to group by company name, as this is an aggregated function.

Load

Company_Name,

firstsortedvalue([positive_percent],Load_date) as positive_percent,

firstsortedvalue([negative_percent],Load_date) as negative_percent,

...

FROM [lib://Desktop/Twitter.xlsx]

GROUP BY Company_Name;

I prefer the "right join" solution though!

Erica