15.10 - SUM(numeric_expression ) - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

prodname
Teradata Database
vrm_release
15.10
created_date
December 2015
category
Programming Reference
featnum
B035-1144-151K

The SUM aggregate function to compute the sum of the column or column expression with a numeric data type, specified by numeric_expression.

You cannot specify a SUM function in the definition of a column-partitioned join index.

The data type for any column defined by a SUM function must be typed as FLOAT to avoid numeric overflow.

If you do not assign a data type to a SUM column, Teradata Database types it as FLOAT automatically. If you assign a type other than FLOAT, the system returns an error to the requestor.

SUM DISTINCT is not permitted.

Each aggregate join index must be created with a COUNT(*) or a COUNT(value_expression ). If you do not specify this expression, Teradata Database adds a COUNT(*) to the definition to support index maintenance.

For more information about the SUM aggregate function, see SQL Functions, Operators, Expressions, and Predicates, B035-1145.