15.00 - TOP m PERCENT and Rounding - Teradata Database

Teradata Database SQL Data Definition Language Detailed Topics

Teradata Database
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Programming Reference
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English (United States)

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 …





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.