TRUNC (number)

Syntax

trunc_number::=

Description of the illustration trunc_number.gif


Purpose

The TRUNC (number) function returns n truncated to m decimal places. If m is omitted, then n is truncated to 0 places. m can be negative to truncate (make zero) m digits left of the decimal point.

This function takes as an argument any numeric datatype or any nonnumeric datatype that can be implicitly converted to a numeric datatype. If you omit m, then the function returns the same datatype as the numeric datatype of the argument. If you include m, then the function returns NUMBER.

See Also: Table 2-11, "Implicit Type Conversion Matrix" for more information on implicit conversion

Examples

The following examples truncate numbers:

SELECT TRUNC(15.79,1) "Truncate" FROM DUAL;

  Truncate
----------
      15.7

SELECT TRUNC(15.79,-1) "Truncate" FROM DUAL;

  Truncate
----------
        10