3 Replies Latest reply: Dec 18, 2016 2:39 PM by Richard Judkins RSS

    Count if

    Richard Judkins

      Hi all

       

      So, I have a db table with multiple columns.

       

      One of the columns is Client Id's. Another column is Products - lets call the Products A, B,C & D.

       

      A Client Id can have multiple products.

       

      What I'm wanting to do is calculate how many clients have product A, but not product B, for example, as a Measure.

       

      I'm very new to SQL and Qlik Sense Server - any help appreciated thanks!

        • Re: Count if
          Vineeth Pujari

          Count ({<Product ={'A','C'}>}distinct  Clientid)

          • Re: Count if
            Vineeth Pujari

            Also read

             

            Set Modifiers with implicit field value definitions

            In the above examples, all field values have been explicitly defined or defined through searches. There is however an additional way to define a set of field values by the use of a nested set definition.

            In such cases, the element functions P() and E() must be used, representing the element set of possible values and the excluded values of a field, respectively. Inside the brackets, it is possible to specify one set expression and one field, e.g. P({1} Customer). These functions cannot be used in other expressions:

            Examples:

            sum( {$<Customer = P({1<Product={‘Shoe’}>} Customer)>} Sales )
            returns the sales for current selection, but only those customers that ever have bought the product ‘Shoe’. The element function P( ) here returns a list of possible customers; those that are implied by the selection ‘Shoe’ in the field Product.

            sum( {$<Customer = P({1<Product={‘Shoe’}>})>} Sales )
            same as above. If the field in the element function is omitted, the function will return the possible values of the field specified in the outer assignment.

            sum( {$<Customer = P({1<Product={‘Shoe’}>} Supplier)>} Sales )
            returns the sales for current selection, but only those customers that ever have supplied the product ‘Shoe’. The element function P( ) here returns a list of possible suppliers; those that are implied by the selection ‘Shoe’ in the field Product. The list of suppliers is then used as a selection in the field Customer.

            sum( {$<Customer = E({1<Product={‘Shoe’}>})>} Sales )
            returns the sales for current selection, but only those customers that never bought the product ‘Shoe’. The element function E( ) here returns the list of excluded customers; those that are excluded by the selection ‘Shoe’ in the field Product.