3 Replies Latest reply: Feb 11, 2014 4:30 AM by Vishwaranjan Kumar RSS

    Peek function

    Mark Munich

      When and where to use peek function, what is its importance in qlikview scritpting.

        • Re: Peek function

          It is used in Script:

          - to populate a local variable (from a table content)

          - to populate a row N with a value already loaded (row < N) : to populate an empty value (with a preceeding value), to compute a cumulative sum

           

          Fabrice

          • Re: Peek function
            Vishwaranjan Kumar

            hi

            it is used in script, on output table.

            peek(fieldname [ , row [ , tablename ] ] )

            Returns the contents of the fieldname in the record specified by row in the internal table tablename. Data are fetched from the associative QlikView database.

            Fieldname must be given as a string (e.g. a quoted literal).

            Row must be an integer. 0 denotes the first record, 1 the second and so on. Negative numbers indicate order from the end of the table. -1 denotes the last record read.

            If no row is stated, -1 is assumed.

            Tablename is a table label, see , without the ending colon. If no tablename is stated, the current table is assumed. If used outside the load statement or referring to another table, the tablename must be included.

            Examples:

            peek( 'Sales' )
            returns the value of Sales in the previous record read ( equivalent to previous(Sales) ).

            peek( 'Sales', 2 )
            returns the value of Sales from the third record read from the current internal table.

            peek( 'Sales', -2 )
            returns the value of Sales from the second last record read into the current internal table.

            peek( 'Sales', 0, 'Tab1' )
            returns the value of Sales from the first record read into the input table labeled Tab1.

            Load A, B, numsum( B, peek( 'Bsum' ) ) as Bsum...;
            creates an accumulation of B in Bsum.