15.00 - TOP m PERCENT and Rounding - Teradata Database

Teradata Database SQL Data Definition Language Detailed Topics

prodname
Teradata Database
vrm_release
15.00
category
Programming Reference
featnum
B035-1184-015K

TOP m PERCENT and Rounding

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.