TOP m PERCENT and Rounding - Advanced SQL Engine - Teradata Database

SQL Data Definition Language Detailed Topics

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
17.00
Published
June 2020
Language
English (United States)
Last Update
2021-01-24
dita:mapPath
jpx1556733107962.ditamap
dita:ditavalPath
lze1555437562152.ditaval
dita:id
B035-1184
lifecycle
previous
Product Category
Teradata Vantage™

If ( m *COUNT(*)/100.0) does not evaluate to an integer value, then Teradata Database rounds it up to the next highest integer value; otherwise, the intended result is not achieved. The following table shows how rounding occurs:

IF (m*COUNT(*)/100.0) evaluates to this value … THEN the system rounds it up to this value …
0.1                                          1
9.2                                        10

Teradata Database only applies this rounding up to the first 15 digits following the decimal point. For example, if ( m *COUNT(*)/100.0) evaluates to 0.0000000000000001, or 1 x 10-16, then the system does not round it up to 1.