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The DOUBLE data type is used to represent floating point numbers.

The ranges of values that can be described as normalized values are from -1.7976931348623157E+308 to -2.2250738585072014E-308, 0, and from 2.2250738585072014E-308 to 1.7976931348623157E+308, whereas the values other than normalized values, which are closer to 0, are described as de-normalized values. It conforms to the ANSI/IEEE 754-1985 standard.

The precision p is not specified. The data specified as this data type is represented as double precision (in 15 significant figures).

DOUBLE data types must not be used if you want to store a precise value that exceeds the number of significant figures, as they only store the approximate value of any input value over 15 significant figures.


  • DOUBLE is in 15 significant figures.
  • Extra caution is required when comparing data because the DOUBLE type stores approximate numeric.
  • DOUBLE and DOUBLE PRECISION are used interchangeably.

If you specify 1234.56789 as DOUBLE, 1234.56789 is stored and 1.234567890000000e+03 is displayed.

If you specify 9007199254740993 as DOUBLE, 9007199254740992 is stored and 9.007199254740992e+15 is displayed.