Sum
DataWindow expression function
Description
Calculates the sum of the values in the specified column.
Syntax
|
1 |
Sum ( column { FOR range { DISTINCT { expres1 {, expres2 {, ... } } } } } ) |
|
Argument |
Description |
|---|---|
|
column |
The column for which you want the sum of the data |
|
FOR range (optional) |
The data to be included in the sum. For most
For Crosstabs, specify CROSSTAB for
For Graph and OLE objects, specify one of
|
|
DISTINCT (optional) |
Causes Sum to consider only the distinct values in |
|
expresn (optional) |
One or more expressions that you want to evaluate to |
Return value
The appropriate numeric datatype. Returns the sum of the data values
in column.
Usage
If you specify range, Sum returns the sum of the values in
column within range. If you specify DISTINCT, Sum returns the sum of the
distinct values in column, or if you specify expresn, the sum of the
values of column where the value of expresn is distinct.
For graphs and OLE objects, you do not select the range when you
call the function. The range has already been determined by the Rows
setting on the Data property page (the Range property), and the
aggregation function uses that range. Settings for Rows include the
following:
-
For the Graph or OLE presentation style, Rows is always
All. -
For Graph controls, Rows can be All, Page, or Group.
-
For OLE controls, Rows can be All, Current Row, Page, or Group.
The available choices depend on the layer the control occupies.
Null values are ignored and are not included in the
calculation.
Not in validation rules or filter expressions
You cannot use this or other aggregate functions in validation
rules or filter expressions.
Using an aggregate function cancels the effect of setting Retrieve
Rows As Needed in the painter. To do the aggregation, a DataWindow
object always retrieves all rows.
Examples
This expression returns the sum of the values in group 1 in the
column named salary:
|
1 |
Sum(salary for group 1) |
This expression returns the sum of the values in column 4 on the
page:
|
1 |
Sum(#4 for page) |
Assuming a DataWindow object displays the order number, amount, and
line items for each order, this computed field returns the sum of the
order amount for the distinct order numbers:
|
1 |
Sum(order_amt for all DISTINCT order_nbr) |
See also