![]() ![]() Add a standard table to the sheet with the dimension AgeBucket and name the visualization Age Groups.Open the new sheet and click Edit sheet.Using the Exists() function can help to prevent orphan records/data in the data model, that is, Age and AgeBucket fields that do not have any associated people. If none of the PersonIDs in the AgeTemp table had been loaded into the data model, then the Age and AgeBucket fields would not have been joined to the People table. This clause can also be written like this: Where Exists(PersonID, PersonID). Notice in the AgeTemp table that there are ages listed for PersonID 11 and 12 but since those IDs were not loaded in the data model (in the People table), they are excluded by the Where Exists(PersonID) clause. In the script, the Age and AgeBucket fields are loaded only if the PersonID has already been loaded in the data model. If(IsNull(Age) or Age='', Dual('No age', 5), Add age and age bucket fields to the People table Remember that Employee Count was not a field in the original file This was shown in the example where we calculated the Employee Count by peeking into the previous month’s Employee Count, and then added the difference between the hired and terminated employees for the current month. The Peek() function would be better when you are targeting a field that has not been previously loaded into the table, or when youo need to target a specific row. In the example we calculated the employee variance from month to month. So the Previous() function would be better when you need to show the current value versus the previous value. ![]() (Same as the difference between RecNo() and RowNo().) This means that the two functions will behave differently if you have a Where-clause. Previous() operates on the input to the LOAD statement, whereas Peek() operates on the output of the LOAD statement. The biggest difference between the two functions is that the Peek() function allows the user to look into a field that was not previously loaded into the script whereas the Previous() function can only look into a previously loaded field. Peek() and Previous() allow you to target defined rows within a table. Table following use of Peek and Previous in script The resulting table should look like this: In a new sheet in the app overview, create a table using Date, Hired, Terminated, Employee Count and Employee Var as the columns of the table. Add the following to the end of your script:.If the (-1) is not specified, Qlik Sense will assume that you want to look at the previous record. This tells Qlik Sense to look at the record above the current record. Notice too that in the Peek() function we use a (-1). If the rowno() is greater than 1, we look at last month’s Employee Count and use that number to add to the difference of that month’s Hired minus Terminated employees. If it is equal to 1, no Employee Count will exist, so we populate the field with the difference of Hired minus Terminated. In the expression, we first look to see if the rowno() is equal to 1. The Peek() function lets you identify any value loaded for a defined field. To ensure dates are interpreted correctly using the format from the system variables, the Date function is applied to the Date field. The dates in the Date field in the Excel sheet are in the format MM/DD/YYYY. (ooxml, embedded labels, table is Sheet1) If(rowno()=1, Hired-Terminated, peek(, -1)+(Hired-Terminated)) as ![]()
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