VAR_SAMP Function Syntax | Teradata Vantage - 17.10 - VAR_SAMP Function Syntax - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - SQL Functions, Expressions, and Predicates

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1145-171K
Language
English (United States)
VAR_SAMP ( [ DISTINCT | ALL ] value_expression )

Syntax Elements

DISTINCT
To exclude duplicates of value_expression from the computation.
ALL
All values of value_expression that are not null, including duplicates, are included in the computation.
value_expression
A numeric literal or column expression whose sample variance is to be computed.
The value_expression cannot be a reference to a view column derived from a function, and cannot contain any ordered analytical or aggregate functions.
  • If the value_expression is character, the format is the default format for FLOAT.
  • If the value_expression is numeric, date, or interval, the format is the same format as x.
  • If the value_expression is UDT, the format is the format for the data type to which the UDT is implicitly cast.

The value_expression cannot be a reference to a view column derived from a function, and cannot contain any ordered analytical or aggregate functions.

VARIANCE OF A SAMPLE is valid only for numeric data.
Nulls are not included in the result computation.
Division by zero results in NULL rather than an error.