• n, d: The arguments n and d are expressions that resolve to numbers. The value of d must be in the range of -30 <=d<=30. Any value of d exceeding the maximum absolute value of 30 is truncated to 30 or -30 respectively. If d is not an integer, it is cast to an integer value.

  For example, trunc(123.456,1.5) is considered trunc(123.456,1), and trunc(123.456,50) is treated as trunc(123.456,30).

• return type: double.
  Depending on the values of n and d, the trunc function behaves as follows:

  • If d is a positive value, the function truncates n to d places on the right of the decimal point, that is, retains only d decimal digits to the right of the decimal point.
  • If d is greater than or equal the number of digits to the right of the decimal point in n, the value of n is returned.
  • If d is not specified or zero, the function truncates n to zero places.
  • If d is a negative value, the function truncates n to the left of the decimal point, that is, sets d digits to the left of the decimal point to zero. The right of the decimal point is also set to zero. If the number of digits in n to the left of the decimal point is less than or equal to the absolute value of d, then the function returns 0.0.
  • Returns zero if n is zero, regardless of the value of d (except when d is NULL).
  • Returns a NULL value in the following cases:
    • If either of the arguments is a NULL value
    • If either of the arguments does not resolve to a number
  • Returns n if either of the arguments resolves to a NaN or infinity.

SELECT trunc(n,d) FROM Userstocks