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expression function - count distinct [2016/09/14 14:19] (current)
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 +====== Count Distinct (Expression Function) ======
  
 +===== Purpose =====
 +The **Count Distinct** function (COUNT_DISTINCT) is used to count the number of unique values returned by a certain query. It does not add the values together to achieve that use the [[Expression Function - Sum|Sum]] function. ​ If the total number of values is needed regardless of duplicates then the [[Expression Function - Count|Count]] function should be used.
 +
 +{{::​count_distinct_initial.png?​direct&​600|}}
 +
 +===== Parameters =====
 +The **Count Distinct** function has one parameters:
 +
 +==== Field Value ====
 +
 +Allowed Inputs: [[Field|field]] values
 +
 +The parameter of the **Count Distinct** function are the field values to be counted. ​ The input is a query built using the [[Query Builder]] to find [[Field|field]] values on one or many [[record|record(s)]] in a [[Table|table]].
 +
 +===== Output =====
 +
 +The output of the **Count Distinct** function is a number representing a count of all the unique values found.
 +===== Example =====
 +
 +If an Invoice record has 4 related Line Item records, and those records have values of -6, 8, 8, and 24 in the Quantity field, COUNT(${Line Item ~> Quantity}) would result in 3.
expression function - count distinct.txt ยท Last modified: 2016/09/14 14:19 (external edit)
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