8 Replies Latest reply: Jun 14, 2016 2:37 AM by Chanty 4u RSS

    Load the latest record using resident load

    Nishanthi Rajendran

      I have a table where i used to concatenate the excel sheets based on monthly basis and i have City and MonthYear column which is of MMM-YY data type. Now in resident load i should be able to get the latest city where he / she is in.. And I tried the following :

       

      Convert_Date:

      Load

        [User ID],

        City ,

        date(MonthYear,'MMYY') AS MY

      Resident [Emp];

       

      Max_Date:

      load

         

         max(DATE(MY,'MMYY')) AS M

       

      resident Convert_Date Group by [User ID]  ;

       

      But I am not able to get the latest city.

        • Re: Load the latest record using resident load
          Tresesco B

          Try like:

           

          Convert_Date:

          Load

            [User ID],

            City ,

            date#(MonthYear,'MMYY') AS MY

          Resident [Emp];

           

          Max_Date:

          load

            [User ID],

             Date(max(MY)) AS M,

             firstSortedValue(City, -MY) as LatestCity

           

          resident Convert_Date Group by [User ID]  ;

          • Re: Load the latest record using resident load
            Chanty 4u

            try using this

            FirstSortedValue - script function ‒ QlikView

             

            FirstSortedValue - script function

            FirstSortedValue() returns the value from the expression specified in value that corresponds to the result of sorting the sort_weight argument, taking into account rank, if specified. If more than one resulting value shares the same sort_weight for the specified rank, the function returns NULL.

            The sorted values are iterated over a number of records, as defined by a group by clause, or aggregated across the full data set if no group by clause is defined.

            Syntax:

            FirstSortedValue ([ distinct ] value, sort-weight [, rank ])

            Return data type: dual

            Arguments:

            ArgumentDescription
            value ExpressionThe function finds the value of the expression value that corresponds to the result of sorting sort_weight.
            sort-weight ExpressionThe expression containing the data to be sorted. The first (lowest) value of sort_weight is found, from which the corresponding value of the value expression is determined. If you place a minus sign in front of sort_weight, the function returns the last (highest) sorted value instead.
            rank Expression

            By stating a rank "n" larger than 1, you get the nth sorted value.

            distinct

            If the word DISTINCT occurs before the function arguments, duplicates resulting from the evaluation of the function arguments are disregarded.

            Examples and results:

            Add the example script to your document and run it. Then add, at least, the fields listed in the results column to a sheet in our document to see the result.

            ExampleResult
            Temp:

            LOAD * inline [

            Customer|Product|OrderNumber|UnitSales|CustomerID

            Astrida|AA|1|10|1

            Astrida|AA|7|18|1

            Astrida|BB|4|9|1

            Astrida|CC|6|2|1

            Betacab|AA|5|4|2

            Betacab|BB|2|5|2

            Betacab|DD|12|25|2

            Canutility|AA|3|8|3

            Canutility|CC|13|19|3

            Divadip|AA|9|16|4

            Divadip|AA|10|16|4

            Divadip|DD|11|10|4

            ] (delimiter is '|');

             

            FirstSortedValue:

            LOAD Customer,FirstSortedValue(Product, UnitSales) as MyProductWithSmallestOrderByCustomer Resident Temp Group By Customer;

            Customer MyProductWithSmallestOrderByCustomer

            Astrida CC

            Betacab AA

            Canutility AA

            Divadip DD

            The function sorts UnitSales from smallest to largest, looging for the value of Customer with the smallest value of UnitSales, the smallest order.

            Because CC corresponds to the smallest order (value of UnitSales=2) for customer Astrida. AA corresponds to the smallest order (4) for customerBetacab, CC corresponds to the smallest order (8) for customer Canutility, and DD corresponds to the smallest order (10) for customer Divadip..

            Given that the Temp table is loaded as in the previous example:

            LOAD Customer,FirstSortedValue(Product, -UnitSales) as MyProductWithLargestOrderByCustomer Resident Temp Group By Customer;

            Customer MyProductWithLargestOrderByCustomer

            Astrida AA

            Betacab DD

            Canutility CC

            Divadip -

            A minus sign precedes the sort_weight argument, so the function sorts the largest first.

            Because AA corresponds to the largest order (value of UnitSales:18) for customer Astrida, DD corresponds to the largest order (12) for customerBetacab, and CC corresponds to the largest order (13) for customerCanutility. There are two identical values for the largest order (16) for customer Divadip, therefore this produces a null result.

            Given that the Temp table is loaded as in the previous example:

            LOAD Customer,FirstSortedValue(distinct Product, UnitSales) as MyProductWithSmallestOrderByCustomer Resident Temp Group By Customer;

            Customer MyProductWithLargestOrderByCustomer

            Astrida AA

            Betacab DD

            Canutility CC

            Divadip AA

            This is the same as the previous example, except the distinct qualifier is used. This causes the duplicate result for Divadip to be disregarded, allowing a non-null value to be returned.