Statistical expressions compute values based on a value
       expression evaluated for each record in a record stream.
       Format
       To specify the average, maximum, minimum, standard deviation, or
       total:

       { AVERAGE }
       { MAX     }
       { MIN     } value-expression [OF rse]
       { STD_DEV }
       {         }
       { TOTAL   }

       To specify the count:

       COUNT  [OF rse]

       To specify the running count:

       RUNNING COUNT

       To specify the running total:

       RUNNING TOTAL value-expression

1  –  Arguments

    value-expression

       Is a DEC DATATRIEVE value expression on which the statistical
       function operates.

    OF rse

       Is a record selection expression you can use to form a record
       stream of the records to which the statistical function applies.

       Values Derived with Statistical Functions shows the operations
       performed by the DEC DATATRIEVE statistical functions.

       Table 1 Values Derived with Statistical Functions

       Function        Value of Function

       AVERAGE         The average value of the value expression
       COUNT           The number of records in the CURRENT collection
                       or in a specified collection or record stream
       MAX             The largest value of the value expression
       MIN             The smallest value of the value expression
       RUNNING COUNT   The running count of the evaluations of the PRINT
                       statement
       RUNNING TOTAL   The running total of the value expression for
                       each evaluation of the PRINT statement
       STD_DEV         The standard deviation of the value expression
       TOTAL           The total value of the value expression