17.10 - Ordered Analytical Functions - 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)

Ordered analytical functions provide support for many common operations in analytical processing and data mining that require an ordered set of results rows or depend on values in a previous row. Ordered analytical functions enable and expedite the processing of queries containing On Line Analytical Processing (OLAP) style decision support requests.

For example, computing a seven-day running sum requires:

  • First, that rows be ordered by date.
  • Then, that the value for the running sum be computed by:
    • Adding the current row value to the value of the sum from the previous row, and
    • Subtracting the value from the row eight days ago.