DOUBLE

The DOUBLE data type provides 8-byte storage for numbers using IEEE floating-point notation. DOUBLE PRECISION can be used synonymously with DOUBLE, and the documentation for this topic is identical to the documentation for the DOUBLE PRECISION topic.

Syntax

DOUBLE

or, alternately

DOUBLE PRECISION

Usage Notes

Here are several usage notes for the DOUBLE/DOUBLE PRECISION data type:

  • The following range limitations apply:
    Limit typeLimitation
    Smallest DOUBLE value-1.79769E+308
    Largest DOUBLE value 1.79769E+308
    Smallest positive DOUBLE value 2.225E-307
    Largest negative DOUBLE value-2.225E-307

    These limits are different from the java.lang.Double Java type limits.

  • An exception is thrown when any double value is calculated or entered that is outside of these value ranges. Arithmetic operations do not round their resulting values to zero. If the values are too small, you will receive an exception.
  • Numeric floating point constants are limited to a length of 30 characters.
       -- this example will fail because the constant is too long:
    values 01234567890123456789012345678901e0;
    
  • When mixed with other data types in expressions, the resulting data type follows the rules shown in Storing values of one numeric data type in columns of another numeric data type.

Corresponding Compile-time Java Type

java.lang.Double

JDBC Metadata Type (java.sql.Types)

DOUBLE

Examples

3421E+09
425.43E9
9E-10
4356267544.32333E+30