difference between peek and field value?

Fri, 12 Sep 2014 05:40:03 GMT

Re: difference between peek and field value?

Anonymous — Fri, 12 Sep 2014 05:42:26 GMT

Fieldvalue(fieldname , n)

Returns the field value found in position n of the field fieldname (by load order). Fieldname must be given as a string value, e.g. the field name must be enclosed by single quotes. The first field value is returned for n=1. If n is larger than the number of field values, NULL is returned.

Note: This function will only work with distinct field values.

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 Table Labels, 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.

Re: difference between peek and field value?

tresB — Fri, 12 Sep 2014 05:45:22 GMT

One major difference:

FieldValue - only works when field values are distinct(which is not the case with Peek).

Re: difference between peek and field value?

SunilChauhan — Fri, 12 Sep 2014 05:46:55 GMT

and one more is peek can be used as previous but fieldvalue cannot

topic Re: difference between peek and field value? in QlikView

difference between peek and field value?

Re: difference between peek and field value?

Re: difference between peek and field value?

Re: difference between peek and field value?