AGGREGATETYPE attribute

The AGGREGATETYPE attribute defines how the aggregate field value is computed.

Syntax

AGGREGATETYPE = { PROGRAM | SUM | AVG | MIN | MAX | COUNT }

Usage

PROGRAM specifies that the aggregate value will be computed and displayed by the program code.

An aggregate type different from PROGRAM specifies that the aggregate value is computed automatically:
  • SUM computes the total of all values of the corresponding numeric column.
  • AVG computes the average of all values of the corresponding numeric column.
  • MIN displays the minimum value of the corresponding numeric column.
  • MAX displays the maximum value of the corresponding numeric column.
  • COUNT computes the number of rows.

The SUM and AVG aggregate types apply to data types that can be used as operand for an addition, such as INTEGER, DECIMAL, INTERVAL.

The MIN and MAX aggregate types apply to data types that can be compared, such as INTEGER, DECIMAL, INTERVAL, CHAR, DATETIME.

When all values of a column are NULL, the value of a computed aggregate is NULL and show up empty.

With SUM and AVG aggregate types, the NULL values are equivalent to zero. With MIN and MAX aggregate types, NULL values are ignored.

Aggregate fields are not rendered when using a FLIPPED table.

For more details, see Summary lines in tables.

Example

AGGREGATE tot = FORMONLY.total, AGGREGATETYPE=PROGRAM;